Energy-PSD double-correction method, device and equipment suitable for digital pulse waveform discrimination

Abstract

The invention provides an energy-PSD double-correction method, device and equipment suitable for digital pulse waveform discrimination, and relates to the technical field of nuclear radiation detection.The method comprises the steps that a current PSD-energy two-dimensional spectrum is obtained through a nuclear radiation detecting instrument, the current PSD-energy two-dimensional spectrum is converted into a one-dimensional energy spectrum through a first preset formula, and the one-dimensional energy spectrum is obtained; converting the one-dimensional energy spectrum into a one-dimensional PSD spectrum by using a second preset formula; determining a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum by using a preset peak searching algorithm, determining an energy spectrum gain coefficient, and determining a PSD gain coefficient; and correcting the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, determining a main target ray counting rate in the target PSD-energy two-dimensional spectrum, and discriminating the target ray counting rate. According to the invention, discrimination errors caused by temperature changes or other factors can be effectively reduced, and the accuracy and reliability of particle discrimination are improved.

Description

Technical Field

[0001] The present invention relates to the field of nuclear radiation detection technology, and in particular to an energy-PSD dual correction method, device and equipment suitable for digital pulse waveform identification. Background Art

[0002] In the field of nuclear radiation detection, digital pulse shape discrimination (PSD) technology is a commonly used particle identification method. Different particles produce luminescence in a scintillator with different luminescence time constants, resulting in different waveforms in the electrical signal output by the photomultiplier tube. The electrical signal is amplified by a current-sensitive preamplifier circuit, and the digitized pulse waveform data is acquired using a digital multichannel analyzer (MCA). Particles can then be identified using PSD algorithms, such as charge comparison, rise time, frequency domain analysis, and intelligent analysis. For example, the charge comparison method calculates the total pulse charge Q, the fast component charge Qf, and the slow component charge Qs, and defines the PSD value as Qf / Q or Qs / Q to perform particle identification. For example, when using NaIL crystals to distinguish neutrons from gamma rays, the pulse signal generated by neutrons has a smaller time constant than that of gamma rays. Therefore, the particle type can be determined by comparing Qf / Q with a specific PSD threshold.

[0003] However, due to consistency issues with the scintillator, photomultiplier tube, preamplifier circuit, temperature sensor, and charge integration window selection used in nuclear radiation detection instruments, each radiation detection instrument must undergo individual pre-shipment testing to determine the relationship between the operating ambient temperature and the PSD threshold. This process significantly increases the length of pre-shipment testing, considering that it takes several hours for the instrument to reach thermal equilibrium after adjusting the operating ambient temperature, and that accurate representation of this relationship requires a wide range of operating temperature points. This does not meet the requirements of large-scale production. Temperature characteristic testing is somewhat destructive, and prolonged testing may negatively impact the instrument's paint, circuitry, and other components. Temperature sensors, scintillators, photomultiplier tubes, and preamplifier circuits vary in their sensitivity to temperature changes. Changes in temperature sensor readings may not fully match performance changes in other components, potentially leading to inaccurate PSD threshold corrections based on temperature sensor readings during instrument use. After long-term use, the performance of the temperature sensor, scintillator, photomultiplier tube, preamplifier circuit, etc. of the nuclear radiation detection instrument may change, resulting in the correspondence between the working environment temperature and PSD threshold determined at the factory not being consistent with the real-time status of the equipment, resulting in inaccurate correction of the PSD threshold based on the change in temperature sensor reading.

[0004] However, there is currently no technical solution that can solve the above technical problems, and there is no energy-PSD dual correction method, device and equipment suitable for digital pulse waveform identification. Summary of the Invention

[0005] The present invention provides an energy-PSD dual correction method, device and equipment suitable for digital pulse waveform identification, which realizes energy-PSD dual correction in a more efficient and accurate manner, thereby improving the accuracy and reliability of nuclear radiation detection.

[0006] In a first aspect, the present invention provides an energy-PSD dual correction method suitable for digital pulse waveform discrimination, comprising:

[0007] Obtaining a current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, counting the operating time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, converting the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and converting the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula;

[0008] Determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak finding algorithm, and determine an energy spectrum gain coefficient when the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, and determine a PSD gain coefficient when the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum;

[0009] The current PSD-energy two-dimensional spectrum is corrected according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum are determined.

[0010] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, before obtaining the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, the method further includes:

[0011] Defining the main target ray, screening target ray and preset PSD peak stabilization period of the nuclear radiation detection instrument;

[0012] According to the energy calibration test of the nuclear radiation detection instrument, the energy calibration coefficient, the stable peak position of the one-dimensional energy spectrum, the stable peak position of the one-dimensional PSD spectrum, and the energy range of the energy spectrum measurement are set;

[0013] Determining a target energy range and a target PSD value range for identifying target rays based on the energy-PSD value two-dimensional spectrum measurement of the nuclear radiation detection instrument;

[0014] The main target ray is gamma ray, the identification target ray is neutron, and the preset PSD peak stabilization period is 600 seconds;

[0015] The target energy range is 3.0 MeV to 3.5 MeV, and the target PSD value range is 0.63 to 0.73;

[0016] The main target ray counting rate is a gamma ray counting rate, and the screening target ray counting rate is a neutron counting rate.

[0017] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, after obtaining the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, the method further includes:

[0018] When the working time of the nuclear radiation detection instrument is less than or equal to the preset PSD peak stabilization period, the target ray identification count value in the target PSD-energy two-dimensional spectrum is counted according to the target energy upper limit of the target ray identification, the target energy lower limit of the target ray identification, and the target PSD value range;

[0019] According to the upper limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument and the lower limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument, a total value in the target PSD-energy two-dimensional spectrum is counted;

[0020] The main target ray count value is determined according to the total value and the screening target ray count value to determine the main target ray count rate and the screening target ray count rate.

[0021] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, the conversion of the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using the first preset formula includes:

[0022]

[0023] Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

[0024] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, the conversion of the one-dimensional energy spectrum into the one-dimensional PSD spectrum using the second preset formula includes:

[0025]

[0026] Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of the unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and E ThrH To identify the upper limit of target energy of target rays, E ThrL The target energy lower limit for identifying target rays, E H The upper limit of the energy range for energy spectrum measurement of nuclear radiation detection instruments, E L is the lower limit of the energy range of energy spectrum measurement for nuclear radiation detection instruments, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

[0027] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, when the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining the energy spectrum gain coefficient; when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, determining the PSD gain coefficient, including:

[0028] When the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining the energy spectrum gain coefficient according to the quotient of the stable peak position of the one-dimensional energy spectrum and the first peak position;

[0029] When the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, a PSD gain coefficient is determined according to a quotient of the stable peak position of the one-dimensional PSD spectrum and the second peak position.

[0030] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, the current PSD-energy two-dimensional spectrum is corrected according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, including:

[0031] Determine the corrected energy spectrum channel number according to the product of the energy spectrum gain coefficient and the current energy spectrum channel number, input the corrected energy spectrum channel number into a preset function formula to obtain the corrected energy;

[0032] Determine a corrected PSD value according to the product of the PSD gain coefficient and the current PSD value;

[0033] Update the current PSD-energy two-dimensional spectrum according to the corrected energy and the corrected PSD value to obtain a target PSD-energy two-dimensional spectrum;

[0034] The current energy spectrum channel number and the current PSD value are determined according to the current PSD-energy two-dimensional spectrum.

[0035] According to the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, the input of the corrected energy spectrum channel number into a preset function formula to obtain the corrected energy includes:

[0036] Determining a first value according to the product of the square of the corrected energy spectrum channel number and the first energy calibration coefficient;

[0037] Determining a second value according to the product of the corrected energy spectrum channel number and the second energy calibration coefficient;

[0038] The corrected energy is determined according to the sum of the first value, the second value, and a third energy calibration coefficient.

[0039] In a second aspect, an energy-PSD dual correction device suitable for digital pulse waveform discrimination is provided, comprising:

[0040] a conversion unit configured to obtain a current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, calculate a working time of the nuclear radiation detection instrument, preset a PSD peak stabilization period at each interval, convert the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and convert the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula;

[0041] a determining unit, the determining unit being configured to determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak-finding algorithm, and determining an energy spectrum gain coefficient when the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, and determining a PSD gain coefficient when the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum;

[0042] A correction unit is used to correct the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and determine the main target ray counting rate and the identification target ray counting rate in the target PSD-energy two-dimensional spectrum.

[0043] In a third aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the energy-PSD dual correction method suitable for digital pulse waveform identification is implemented.

[0044] The present invention adopts an energy-PSD dual correction method, avoiding the long and costly pre-shipment tests based on temperature measurement in traditional methods. Each device does not need to undergo a separate, long-term environmental temperature adaptability test, thereby significantly shortening the production cycle, reducing production costs, and meeting the needs of large-scale production. The long-term temperature test in the traditional method may have a negative impact on the paint, circuits, etc. of the equipment. The present invention avoids this potential risk through a real-time correction mechanism, protecting the long-term stability and reliability of the equipment. By simultaneously considering the correction of energy and PSD values, it can more accurately respond to changes in the overall performance of nuclear radiation detection instruments, rather than just changes in ambient temperature. This dual correction mechanism effectively reduces identification errors caused by temperature changes or other factors, and improves the accuracy and reliability of particle identification.

[0045] The dual correction method of the present invention is highly scalable. Through simple energy window and PSD window settings, it can easily meet the needs of modifying and adding the types of particles to be identified or reaction channels, which enables the device to flexibly adapt to different application scenarios and needs, and improves the versatility and practicality of the device; through the preset peak stabilization period and real-time correction mechanism, the stability of the energy spectrum and PSD spectrum is ensured. During the operation of the equipment, the system will automatically determine whether peak stabilization correction is required, and adjust the energy spectrum and PSD spectrum according to the correction coefficient, thereby ensuring the accuracy and reliability of the measurement results; through accurate energy and PSD value correction, the present invention can more accurately count the counting rates of the main target rays and the identified target rays, which helps users to understand the radiation environment more accurately and provide a reliable basis for subsequent decision-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 This is a schematic diagram of the process of nuclear radiation detectors before they leave the factory in the prior art;

[0048] Figure 2 This is a schematic diagram of the process of using a nuclear radiation detector in the prior art;

[0049] Figure 3 Schematic diagram of the process of the energy-PSD dual correction method for digital pulse waveform identification provided by the present invention;

[0050] Figure 4This is a schematic diagram of the process of the nuclear radiation detector provided by the present invention before it leaves the factory;

[0051] Figure 5 This is a schematic diagram of the process of using the nuclear radiation detector provided by the present invention;

[0052] Figure 6 Schematic diagram of the structure of the energy-PSD dual correction device for digital pulse waveform discrimination provided by the present invention;

[0053] Figure 7 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0055] Digital pulse waveform discrimination technology is often used in nuclear radiation detection instruments to discriminate different particles when performing radiation measurements. For example, when using plastic scintillators to measure alpha rays and beta rays, this technology is used to discriminate alpha rays and beta rays; when using crystal scintillators to measure neutrons and gamma rays, this technology is used to discriminate neutrons and gamma rays. Its main working principle is that different particles, such as electrons, alpha particles, and protons, cause luminescence phenomena in scintillators with different luminescence time constants, so the electrical signals output by the photomultiplier tube have different waveforms. The electrical signal is amplified using a current-sensitive preamplifier circuit and then input into a digital multi-channel analyzer to obtain digital pulse waveform data. PSD discrimination algorithms include charge comparison method, rise time method, frequency domain analysis method, and intelligent analysis method. Taking the charge comparison method as an example:

[0056] Define Q as the total pulse charge, Qf as the fast component charge, and Qs as the slow component charge. Different particles will have different Qf / Q, Qs / Q, and Qf / Qs. Define the PSD value as follows:

[0057]

[0058] The charge comparison method discriminates particles based on differences in PSD values. For example, using a NaIL crystal to discriminate between neutrons and gamma rays, the pulse signal generated by a neutron has a smaller time constant than that of a gamma ray. Therefore, if Qf / Q is greater than a specific PSD threshold, the particle is identified as a neutron; if Qf / Q is less than the PSD threshold, the particle is identified as a gamma ray.

[0059] However, the luminous efficiency and luminescence time constant of scintillators are directly affected by ambient temperature. Therefore, the energy spectrum and PSD spectrum measured at different temperatures will shift with temperature changes. When the PSD threshold is fixed, temperature changes can lead to discrimination errors, affecting the particle detection effect and detection efficiency.

[0060] To avoid the above problems, it is generally necessary to dynamically set the PSD threshold according to the working environment temperature of the detection instrument. Taking the use of nuclear radiation detection instruments based on NaIL crystals to achieve neutron and gamma ray discrimination as an example, the steps required before the equipment leaves the factory can be referred to. Figure 1 The flow chart of the use of nuclear radiation detectors in the subsequent existing technology can be referred to Figure 2 Specifically, the main work flow is as follows:

[0061] 1. Define the primary target ray, discrimination target ray, and peak stabilization period for the nuclear radiation detection instrument. For example, define gamma rays as the primary target ray, neutrons as the discrimination target ray, and a peak stabilization period of 600 seconds. In this case, the device needs to stabilize its peak every 600 seconds of operation.

[0062] 2. Conduct energy calibration test on nuclear radiation detection instrument, set energy calibration coefficient, energy spectrum stable peak position K0, and energy range of energy spectrum measurement.

[0063] 3. Conduct two-dimensional spectrum measurement of the energy-PSD value of the nuclear radiation detection instrument (using a radioactive source that generates target identification rays) to clarify the target energy range of the target identification rays.

[0064] 4. Change the working environment temperature of the nuclear radiation detection instrument and maintain it for several hours to allow the entire equipment to reach a thermal equilibrium state.

[0065] 5. Nuclear radiation detection instruments measure ambient temperature and energy-PSD value two-dimensional spectrum (using a radioactive source that produces target identification rays).

[0066] 6. Determine the PSD threshold at the working environment temperature and establish a corresponding relationship between the working environment temperature and the PSD threshold.

[0067] 7. Determine whether the temperature test covers the operating environment temperature range. If so, end the temperature characteristic test; if not, return to step 4.

[0068] 8. Use a nuclear radiation detection instrument to measure and obtain the PSD-energy two-dimensional spectrum P1 and the temperature measurement value T. The energy E and the corrected energy spectrum channel number h satisfy the following functional relationship:

[0069] E=a·h 2 +b·h+c (1)

[0070] Where a, b, and c are energy scale coefficients. If the number of uncorrected energy spectrum channels is h', then

[0071] h=h'·g1 (2)

[0072] Where g1 is the energy spectrum gain coefficient.

[0073] Determine whether energy spectrum peak stabilization correction is required based on the equipment operating time and peak stabilization period. If not, proceed to step 11; if so, proceed to the next step.

[0074] 9. Convert the statistical PSD-energy two-dimensional spectrum P1 into a one-dimensional energy spectrum P2. The first preset formula is as follows:

[0075]

[0076] Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

[0077] 10. Smooth and transform the one-dimensional energy spectrum P2, and determine the energy spectrum peak position K1 through peak area calculation, peak search algorithm, etc. When the energy spectrum stable peak position K0 and peak position K1 are inconsistent, update the energy spectrum gain coefficient g1:

[0078]

[0079] And update the PSD-energy two-dimensional spectrum P1.

[0080] 11. Statistical PSD-energy two-dimensional spectrum P1 identifies target ray count N2. The calculation formula is as follows:

[0081]

[0082] Where n(psd,E) is the count value per unit psd and per unit E in the PSD-energy two-dimensional spectrum; psd Thr is the PSD threshold; E ThrH and E ThrL They are the upper and lower limits of target energy for identifying target rays respectively.

[0083] 12. Count the total number N in the PSD-energy two-dimensional spectrum P1. The calculation formula is as follows

[0084]

[0085] Among them E H and E L They are respectively the upper and lower energy limits of energy spectrum measurement by nuclear radiation detection instruments.

[0086] 13. Calculate the count N1 of the primary target ray using the following formula:

[0087] N1=N-N2 (7)

[0088] 14. Complete subsequent counting rate and dose rate calculations, energy spectrum and PSD value spectrum statistics, energy spectrum-PSD two-dimensional spectrum, energy spectrum, PSD spectrum display and other tasks.

[0089] In order to solve the above technical problems, the present application proposes an energy-PSD dual correction method, device and equipment suitable for digital pulse waveform identification. Figure 3 : This is a flow chart of an energy-PSD dual correction method for digital pulse waveform identification provided by the present invention, which includes:

[0090] Step 101: Using a nuclear radiation detection instrument to obtain a current PSD-energy two-dimensional spectrum, counting the operating time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, converting the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and converting the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula;

[0091] Step 102: Determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak-finding algorithm; if the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, determine an energy spectrum gain coefficient; if the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum, determine a PSD gain coefficient;

[0092] Step 103: correct the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and determine the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum.

[0093] In step 101, before obtaining the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, the method further includes:

[0094] Defining the main target ray, screening target ray and preset PSD peak stabilization period of the nuclear radiation detection instrument;

[0095] According to the energy calibration test of the nuclear radiation detection instrument, the energy calibration coefficient, the stable peak position of the one-dimensional energy spectrum, the stable peak position of the one-dimensional PSD spectrum, and the energy range of the energy spectrum measurement are set;

[0096] Determining a target energy range and a target PSD value range for identifying target rays based on the energy-PSD value two-dimensional spectrum measurement of the nuclear radiation detection instrument;

[0097] The main target ray is gamma ray, the identification target ray is neutron, and the preset PSD peak stabilization period is 600 seconds;

[0098] The target energy range is 3.0 MeV to 3.5 MeV, and the target PSD value range is 0.63 to 0.73;

[0099] The main target ray counting rate is a gamma ray counting rate, and the screening target ray counting rate is a neutron counting rate.

[0100] Optionally, based on the actual application scenario, determine the primary radiation type of concern and identify other radiation types that need to be screened against the primary target radiation. Set an appropriate preset PSD peak stabilization period based on the device's stability and application requirements. This period determines how often the device automatically adjusts the PSD threshold to ensure accurate screening. Optionally, the preset PSD peak stabilization period can be dynamically adjusted based on the device's real-time operating status or environmental conditions. For example, if the device's operating temperature fluctuates significantly, the correction period can be shortened.

[0101] Optionally, a radioactive source of known energy is used to perform an energy calibration test on the nuclear radiation detection instrument, and the response values ​​at different energies are recorded. Based on the results of the energy calibration test, an energy calibration coefficient is calculated to convert the response value of the detection instrument into an actual energy value. This coefficient is usually a linear or nonlinear function, which is used to calibrate the energy response of the detection instrument. For detection instruments with a large energy response range, a multi-segment calibration method can be used to calibrate different energy segments to improve the accuracy of the calibration. A nuclear radiation detection instrument is used to measure a radioactive source containing target radiation to obtain an energy-PSD value two-dimensional spectrum. The energy-PSD value two-dimensional spectrum shows the PSD value distribution at different energies. Based on the results of the two-dimensional spectrum, the main energy distribution range of the target radiation is determined. The main energy distribution range is usually determined by analyzing the peak, width and shape of the spectrum. Similarly, based on the results of the two-dimensional spectrum, the PSD value range corresponding to the target radiation is determined. The PSD value range is used to judge the particle type during subsequent particle identification.

[0102] Specifically, define the primary target ray, discrimination target ray, and peak stabilization period for the nuclear radiation detection instrument. For example, define gamma rays as the primary target ray, neutrons as the discrimination target ray, and a peak stabilization period of 600 seconds. In this case, peak stabilization is required every 600 seconds of operation. During the energy calibration test for the nuclear radiation detection instrument, set the energy calibration factor, energy spectrum peak stabilization position K0, PSD spectrum peak stabilization position k0, and the energy range for energy spectrum measurement. Perform a two-dimensional energy-PSD spectrum measurement on the nuclear radiation detection instrument (using a radioactive source that generates discrimination target rays) and set the energy range and PSD range for the discrimination target ray. For example, using an AmBe source and measuring a two-dimensional energy-PSD spectrum, determine and set the target energy range to 3.0 MeV to 3.5 MeV and the target PSD range to 0.63 to 0.73 based on the test results. This means that only particles with energies between 3.0 MeV and 3.5 MeV and a PSD value greater than 0.63 will be identified as neutrons.

[0103] Optionally, after obtaining the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, the method further includes:

[0104] When the working time of the nuclear radiation detection instrument is less than or equal to the preset PSD peak stabilization period, the target ray identification count value in the target PSD-energy two-dimensional spectrum is counted according to the target energy upper limit of the target ray identification, the target energy lower limit of the target ray identification, and the target PSD value range;

[0105] According to the upper limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument and the lower limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument, a total value in the target PSD-energy two-dimensional spectrum is counted;

[0106] The main target ray count value is determined according to the total value and the screening target ray count value to determine the main target ray count rate and the screening target ray count rate.

[0107] In this optional embodiment, the system checks whether the operating time of the nuclear radiation detection instrument is less than or equal to the preset PSD threshold correction period. This is a key condition for determining whether to execute the subsequent statistical steps. If the operating time condition is met, the system will filter out data points within the target energy range and the target PSD value range from the currently acquired PSD-energy two-dimensional spectrum. These data points correspond to the counts of the target rays. The system will count the number of these filtered data points, that is, the count value of the target rays. At the same time, the system will also count the total number of data points in the entire PSD-energy two-dimensional spectrum, that is, the total value. This total value represents the total number of all detected rays. Based on the total value and the target ray count value, the system will determine the count value of the main target ray by calculating their difference. This is because the total value includes all detected rays, while the identification target ray count value represents a specific type of rays. Finally, the system will calculate the counting rate of the identification target ray and the main target ray based on the identification target ray count value and the main target ray count value, as well as the current measurement duration. The counting rate is the number of rays detected per unit time and is an important indicator for evaluating ray intensity.

[0108] Optionally, it is necessary to clearly define the target energy upper limit and target energy lower limit for identifying target rays. These two values ​​are determined based on actual application requirements and equipment characteristics, and are used to define the energy range that needs to be paid attention to. Similarly, it is also necessary to determine the target PSD value range. This range corresponds to the characteristics of identifying target rays in the PSD dimension. Each data point in the target PSD-energy two-dimensional spectrum is traversed, and the data points that meet the conditions are counted. The total number obtained is the count value for identifying target rays. Similarly, the energy range upper limit and energy range lower limit of the energy spectrum measurement of nuclear radiation detection instruments are clearly defined. These two values ​​define the entire energy range that the equipment can detect. Each data point in the target PSD-energy two-dimensional spectrum is traversed, and the data points that meet the conditions are counted. The total number obtained is the total value, which represents the total number of all rays detected within the entire energy spectrum measurement range.

[0109] In step 102, a preset peak-finding algorithm is used to determine the first peak position of the one-dimensional energy spectrum and the second peak position of the one-dimensional PSD spectrum. For the one-dimensional PSD spectrum, the one-dimensional PSD spectrum is traversed to find all local maximum points, where the value of any point is greater than the point corresponding to the values ​​on the left and right sides of the point. All candidate peaks are determined based on all local maximum points, and the candidate peak with the largest count value is determined as the maximum peak. The second peak position is the PSD value corresponding to the horizontal coordinate of the maximum peak. For the one-dimensional energy spectrum, the one-dimensional energy spectrum is traversed to find all local maximum points, where the value of any point is greater than the point corresponding to the values ​​on the left and right sides of the point. All candidate peaks are determined based on all local maximum points, and the candidate peak with the largest count value is determined as the maximum peak. The first peak position is the energy value corresponding to the horizontal coordinate of the maximum peak.

[0110] Optionally, when the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining the energy spectrum gain coefficient, and when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, determining the PSD gain coefficient, includes:

[0111] When the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining the energy spectrum gain coefficient according to the quotient of the stable peak position of the one-dimensional energy spectrum and the first peak position;

[0112] When the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, a PSD gain coefficient is determined according to a quotient of the stable peak position of the one-dimensional PSD spectrum and the second peak position.

[0113] Optionally, when the first peak position is consistent with the stable peak position of the one-dimensional energy spectrum, there is no need to determine the energy spectrum gain coefficient; when the second peak position is consistent with the stable peak position of the one-dimensional PSD spectrum, there is no need to determine the PSD gain coefficient.

[0114] Optionally, the correcting the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum includes:

[0115] The corrected energy spectrum channel number is determined according to the product of the energy spectrum gain coefficient and the current energy spectrum channel number. Referring to Formula 2, the corrected energy spectrum channel number is input into a preset function formula to obtain the corrected energy;

[0116] Determine a corrected PSD value according to the product of the PSD gain coefficient and the current PSD value, and refer to Formula 8 to update the current PSD-energy two-dimensional spectrum according to the corrected energy and the corrected PSD value to obtain a target PSD-energy two-dimensional spectrum;

[0117] The current energy spectrum channel number and the current PSD value are determined according to the current PSD-energy two-dimensional spectrum.

[0118] Optionally, the input of the corrected energy spectrum channel number into a preset function formula to obtain the corrected energy includes: determining a first value based on the product of the square of the corrected energy spectrum channel number and a first energy scale coefficient; determining a second value based on the product of the corrected energy spectrum channel number and a second energy scale coefficient; determining the corrected energy based on the sum of the first value, the second value and the third energy scale coefficient. Specifically, the preset function formula can refer to Formula 1.

[0119] Optional, Figure 4 This is a flow chart of the nuclear radiation detector provided by the present invention before it leaves the factory. Figure 5 This is a flow chart of the use of the nuclear radiation detector provided by the present invention. Figure 4 as well as Figure 5 , to further describe the specific embodiments of this application:

[0120] 1. Use a nuclear radiation detection instrument to measure and obtain the PSD-energy two-dimensional spectrum P1. The energy E and the corrected energy spectrum channel number h satisfy the functional relationship of Formula 1; the energy spectrum channel number is corrected according to Formula 2. The PSD value is calculated as follows:

[0121] psd=psd'·g2 (8)

[0122] Where g2 is the PSD gain factor; psd' is the uncorrected PSD value.

[0123] Determine whether peak stabilization correction is needed based on the equipment working time and peak stabilization period. If not, proceed to step 10; if so, proceed to the next step.

[0124] 2. Convert the statistical PSD-energy two-dimensional spectrum P1 into a one-dimensional energy spectrum P2 according to formula 3.

[0125] 3. Smooth and transform the one-dimensional energy spectrum P2, and determine the energy spectrum peak position K1 through peak area calculation and peak search algorithm. When the energy spectrum stable peak position K0 and peak position K1 are inconsistent, update the energy spectrum gain coefficient g1 according to formula 4.

[0126] 4. Convert the PSD-energy two-dimensional spectrum P1 into a one-dimensional PSD spectrum P3. The second preset formula is as follows:

[0127]

[0128] Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of the unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and E ThrH To identify the upper limit of target energy of target rays, E ThrL The target energy lower limit for identifying target rays, E H The upper limit of the energy range for energy spectrum measurement of nuclear radiation detection instruments, E L is the lower limit of the energy range of energy spectrum measurement for nuclear radiation detection instruments, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

[0129] 5. Smooth and transform the one-dimensional PSD spectrum P3, and determine the PSD peak position k1 by peak area calculation, peak search algorithm, etc. When the PSD stable peak position k0 and peak position k1 are inconsistent, update the PSD gain coefficient g2 according to formula (10):

[0130]

[0131] The PSD-energy two-dimensional spectrum P1 is adjusted and updated based on the energy spectrum gain coefficient and the PSD gain coefficient. Specifically, when g1 changes, the new corrected energy spectrum channel number h is calculated according to Formula 2; further, the new energy E is calculated according to Formula 1. Similarly, when g2 changes, the new corrected PSD value is calculated according to Formula 8. The PSD-energy two-dimensional spectrum P1 changes accordingly.

[0132] 6. Statistically identify the target ray count N2 based on the PSD-energy two-dimensional spectrum P1 and formula 5.

[0133] 7. Count the total number N based on the PSD-energy two-dimensional spectrum P1 and formula 6.

[0134] 8. Calculate the count N1 of the primary target ray according to formula 7.

[0135] 9. Complete subsequent counting rate calculations and other tasks. For example, the neutron counting rate C n The calculation formula is:

[0136] C n =N2 / t (11)

[0137] The formula for calculating the gamma count rate is:

[0138] C γ =N1 / t (12)

[0139] Where t is the measurement time.

[0140] The present invention adopts an energy-PSD dual correction method, avoiding the long and costly pre-shipment tests based on temperature measurement in traditional methods. Each device does not need to undergo a separate, long-term environmental temperature adaptability test, thereby significantly shortening the production cycle, reducing production costs, and meeting the needs of large-scale production. The long-term temperature test in the traditional method may have a negative impact on the paint, circuits, etc. of the equipment. The present invention avoids this potential risk through a real-time correction mechanism, protecting the long-term stability and reliability of the equipment. By simultaneously considering the correction of energy and PSD values, it can more accurately respond to changes in the overall performance of nuclear radiation detection instruments, rather than just changes in ambient temperature. This dual correction mechanism effectively reduces identification errors caused by temperature changes or other factors, and improves the accuracy and reliability of particle identification.

[0141] The dual correction method of the present invention is highly scalable. Through simple energy window and PSD window settings, it can easily meet the needs of modifying and adding the types of particles to be identified or reaction channels, which enables the device to flexibly adapt to different application scenarios and needs, and improves the versatility and practicality of the device; through the preset peak stabilization period and real-time correction mechanism, the stability of the energy spectrum and PSD spectrum is ensured. During the operation of the equipment, the system will automatically determine whether peak stabilization correction is required, and adjust the energy spectrum and PSD spectrum according to the correction coefficient, thereby ensuring the accuracy and reliability of the measurement results; through accurate energy and PSD value correction, the present invention can more accurately count the counting rates of the main target rays and the identified target rays, which helps users to understand the radiation environment more accurately and provide a reliable basis for subsequent decision-making.

[0142] Figure 6 This is a structural schematic diagram of an energy-PSD dual correction device suitable for digital pulse waveform identification provided by the present invention. The energy-PSD dual correction device suitable for digital pulse waveform identification includes a conversion unit 1. The conversion unit 1 is used to obtain the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, count the working time of the nuclear radiation detection instrument, preset a PSD peak stabilization period at each interval, use a first preset formula to convert the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum, and use a second preset formula to convert the one-dimensional energy spectrum into a one-dimensional PSD spectrum. The working principle of the conversion unit 1 can refer to the aforementioned step 101 and will not be repeated here.

[0143] The energy-PSD dual correction device suitable for digital pulse waveform identification also includes a determination unit 2, which is used to determine the first peak position of the one-dimensional energy spectrum and the second peak position of the one-dimensional PSD spectrum using a preset peak-finding algorithm. When the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, the energy spectrum gain coefficient is determined; when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, the PSD gain coefficient is determined. The working principle of the determination unit 2 can be referred to the aforementioned step 102 and will not be repeated here.

[0144] The energy-PSD dual correction device suitable for digital pulse waveform identification also includes a correction unit 3, which is used to correct the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain the target PSD-energy two-dimensional spectrum, and determine the main target ray counting rate and the identification target ray counting rate in the target PSD-energy two-dimensional spectrum. The working principle of the correction unit 3 can be referred to the aforementioned step 103 and will not be repeated here.

[0145] The present invention adopts an energy-PSD dual correction method, avoiding the long and costly pre-shipment tests based on temperature measurement in traditional methods. Each device does not need to undergo a separate, long-term environmental temperature adaptability test, thereby significantly shortening the production cycle, reducing production costs, and meeting the needs of large-scale production. The long-term temperature test in the traditional method may have a negative impact on the paint, circuits, etc. of the equipment. The present invention avoids this potential risk through a real-time correction mechanism, protecting the long-term stability and reliability of the equipment. By simultaneously considering the correction of energy and PSD values, it can more accurately respond to changes in the overall performance of nuclear radiation detection instruments, rather than just changes in ambient temperature. This dual correction mechanism effectively reduces identification errors caused by temperature changes or other factors, and improves the accuracy and reliability of particle identification.

[0146] The dual correction method of the present invention is highly scalable. Through simple energy window and PSD window settings, it can easily meet the needs of modifying and adding the types of particles to be identified or reaction channels, which enables the device to flexibly adapt to different application scenarios and needs, and improves the versatility and practicality of the device; through the preset peak stabilization period and real-time correction mechanism, the stability of the energy spectrum and PSD spectrum is ensured. During the operation of the equipment, the system will automatically determine whether peak stabilization correction is required, and adjust the energy spectrum and PSD spectrum according to the correction coefficient, thereby ensuring the accuracy and reliability of the measurement results; through accurate energy and PSD value correction, the present invention can more accurately count the counting rates of the main target rays and the identified target rays, which helps users to understand the radiation environment more accurately and provide a reliable basis for subsequent decision-making.

[0147] Figure 7 Schematic diagram of the structure of the electronic device provided by the present invention. Figure 7 As shown, the electronic device may include: a processor (processor) 110, a communication interface (Communications Interface) 120, a memory (memory) 130 and a communication bus 140, wherein the processor 110, the communication interface 120, and the memory 130 communicate with each other through the communication bus 140. The processor 110 can call the logic instructions in the memory 130 to execute an energy-PSD dual correction method suitable for digital pulse waveform identification, the method including: using a nuclear radiation detection instrument to obtain a current PSD-energy two-dimensional spectrum, counting the working time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, using a first preset formula to convert the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum, and using a second preset formula to convert the one-dimensional energy spectrum into a one-dimensional PSD spectrum; using a preset peak-finding algorithm to determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum, and when the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining an energy spectrum gain coefficient; and when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, determining a PSD gain coefficient; correcting the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and determining the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum.

[0148] In addition, the logic instructions in the above-mentioned memory 130 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0149] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute an energy-PSD dual correction method suitable for digital pulse waveform identification provided by the above methods. The method includes: using a nuclear radiation detection instrument to obtain a current PSD-energy two-dimensional spectrum, counting the working time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, using a first preset formula to convert the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum, and using a second preset formula to convert a The two-dimensional energy spectrum is a one-dimensional PSD spectrum; a preset peak-finding algorithm is used to determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum; when the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, an energy spectrum gain coefficient is determined; when the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum, a PSD gain coefficient is determined; the current PSD-energy two-dimensional spectrum is corrected according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum are determined.

[0150] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the energy-PSD dual correction method provided by the above-mentioned methods for digital pulse waveform identification, the method comprising: obtaining a current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, counting the working time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, converting the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and converting the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula; determining a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak-finding algorithm, determining an energy spectrum gain coefficient when the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, and determining a PSD gain coefficient when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum; correcting the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and determining the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum.

[0151] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0152] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An energy-PSD dual correction method for digital pulse waveform identification, characterized in that: include: Obtaining a current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, counting the operating time of the nuclear radiation detection instrument, presetting a PSD peak stabilization period at each interval, converting the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and converting the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula; Determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak finding algorithm, and determine an energy spectrum gain coefficient when the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, and determine a PSD gain coefficient when the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum; The current PSD-energy two-dimensional spectrum is corrected according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and the main target ray count rate and the identification target ray count rate in the target PSD-energy two-dimensional spectrum are determined.

2. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: Before obtaining the current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, the method further includes: Defining the main target ray, screening target ray and preset PSD peak stabilization period of the nuclear radiation detection instrument; According to the energy calibration test of the nuclear radiation detection instrument, the energy calibration coefficient, the stable peak position of the one-dimensional energy spectrum, the stable peak position of the one-dimensional PSD spectrum, and the energy range of the energy spectrum measurement are set; Determining a target energy range and a target PSD value range for identifying target rays based on the energy-PSD value two-dimensional spectrum measurement of the nuclear radiation detection instrument; The main target ray is gamma ray, the identification target ray is neutron, and the preset PSD peak stabilization period is 600 seconds; The target energy range is 3.0 MeV to 3.5 MeV, and the target PSD value range is 0.63 to 0.73; The main target ray counting rate is a gamma ray counting rate, and the screening target ray counting rate is a neutron counting rate.

3. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: After obtaining the current PSD-energy two-dimensional spectrum using the nuclear radiation detection instrument, the method further includes: When the working time of the nuclear radiation detection instrument is less than or equal to the preset PSD peak stabilization period, the target ray identification count value in the target PSD-energy two-dimensional spectrum is counted according to the target energy upper limit of the target ray identification, the target energy lower limit of the target ray identification, and the target PSD value range; According to the upper limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument and the lower limit of the energy range of the energy spectrum measurement performed by the nuclear radiation detection instrument, a total value in the target PSD-energy two-dimensional spectrum is counted; The main target ray count value is determined according to the total value and the screening target ray count value to determine the main target ray count rate and the screening target ray count rate.

4. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: The method of converting the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using the first preset formula includes: Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

5. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: The converting of the one-dimensional energy spectrum into the one-dimensional PSD spectrum using the second preset formula includes: Where psd is the PSD value; E is the energy value; n(psd,E) is the count value of the unit PSD value and unit energy value at a certain point in the PSD-energy two-dimensional spectrum, and E ThrH To identify the upper limit of target energy of target rays, E ThrL The target energy lower limit for identifying target rays, E H The upper limit of the energy range for energy spectrum measurement of nuclear radiation detection instruments, E L is the lower limit of the energy range of energy spectrum measurement for nuclear radiation detection instruments, and n(psd,E)dpsd is the count value at a certain PSD value in the one-dimensional PSD spectrum.

6. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: The determining of the energy spectrum gain coefficient when the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, and the determining of the PSD gain coefficient when the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, comprises: When the first peak position is inconsistent with the stable peak position of the one-dimensional energy spectrum, determining the energy spectrum gain coefficient according to the quotient of the stable peak position of the one-dimensional energy spectrum and the first peak position; When the second peak position is inconsistent with the stable peak position of the one-dimensional PSD spectrum, a PSD gain coefficient is determined according to a quotient of the stable peak position of the one-dimensional PSD spectrum and the second peak position.

7. The energy-PSD dual correction method for digital pulse waveform identification according to claim 1, characterized in that: The correcting the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum includes: Determine the corrected energy spectrum channel number according to the product of the energy spectrum gain coefficient and the current energy spectrum channel number, input the corrected energy spectrum channel number into a preset function formula to obtain the corrected energy; Determine a corrected PSD value according to the product of the PSD gain coefficient and the current PSD value; Update the current PSD-energy two-dimensional spectrum according to the corrected energy and the corrected PSD value to obtain a target PSD-energy two-dimensional spectrum; The current energy spectrum channel number and the current PSD value are determined according to the current PSD-energy two-dimensional spectrum.

8. The energy-PSD dual correction method for digital pulse waveform identification according to claim 7, characterized in that: The inputting the corrected energy spectrum channel number into a preset function formula to obtain the corrected energy includes: Determining a first value according to the product of the square of the corrected energy spectrum channel number and the first energy calibration coefficient; Determining a second value according to the product of the corrected energy spectrum channel number and the second energy calibration coefficient; The corrected energy is determined according to the sum of the first value, the second value, and a third energy calibration coefficient.

9. An energy-PSD dual correction device suitable for digital pulse waveform identification, characterized in that: include: a conversion unit configured to obtain a current PSD-energy two-dimensional spectrum using a nuclear radiation detection instrument, calculate a working time of the nuclear radiation detection instrument, preset a PSD peak stabilization period at each interval, convert the current PSD-energy two-dimensional spectrum into a one-dimensional energy spectrum using a first preset formula, and convert the one-dimensional energy spectrum into a one-dimensional PSD spectrum using a second preset formula; a determining unit, the determining unit being configured to determine a first peak position of the one-dimensional energy spectrum and a second peak position of the one-dimensional PSD spectrum using a preset peak-finding algorithm, and determining an energy spectrum gain coefficient when the first peak position is inconsistent with a stable peak position of the one-dimensional energy spectrum, and determining a PSD gain coefficient when the second peak position is inconsistent with a stable peak position of the one-dimensional PSD spectrum; A correction unit is used to correct the current PSD-energy two-dimensional spectrum according to the energy spectrum gain coefficient and the PSD gain coefficient to obtain a target PSD-energy two-dimensional spectrum, and determine the main target ray counting rate and the identification target ray counting rate in the target PSD-energy two-dimensional spectrum.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the energy-PSD dual correction method suitable for digital pulse waveform identification as described in any one of claims 1 to 8 is implemented.

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