Energy calibration method for seawater radionuclide detection
A radionuclide and energy calibration technology, applied in the field of seawater detection, can solve problems such as drift, interference in the measurement of marine substances, and inaccuracy in detection, and achieve the effect of improving accuracy
Pending Publication Date: 2021-06-15
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology
[0003] The existing seawater radioactive environmental monitoring methods are usually based on the assumption that the detection signals corresponding to the radioactive substances to be measured in seawater are stable or time-invariant, and are not suitable for complex marine environments.
The actual marine on-site detection environment is complex and changeable, and there are many interference factors
During the actual operation, it was found that changes in the marine environment interfered with the measurement of marine substances, and the peaks of the detected radionuclides drifted. The real conversion relationship between energy
[0004] Based on the above reasons, the existing energy calibration method for detecting radionuclide detection in seawater does not have the accuracy
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.
[0028] The energy calibration method of seawater radionuclide detection provided by the invention, such as figure 1 As shown, the specific process is as follows:
[0029] S101. In the energy spectrum of accumulated data collected at the same time, search for peaks of radionuclide energies of three or more times, and obtain peaks of at least three different radionuclides. Such as figure 2 and 3 shown.
[0030] In this implementation example, after peak searching, three peaks of radionuclides were found, and the channels of the peaks were 432, 478, and 511 respectively.
[0031] S102. Traverse the channels of the radioactive energy spectrum peaks, and calculate the average value of the channels where all nuclides are located; calculate the average value of these channels fo...
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The invention belongs to the technical field of seawater detection, and relates to an energy calibration method for seawater radionuclide detection. The energy calibration method for seawater radionuclide detection comprises the following steps of: searching peaks of at least three different radionuclides; traversing channels of radioactive energy spectrum peaks, and calculating an average value of the channels where all nuclides are located; calculating an average value of energy corresponding to all the nuclides; calculating the slope of a scale straight line; calculating the intercept of the scale straight line; and according to the calculated slope and intercept, acquiring a scale linear formula of an energy and channel address conversion relation. The energy calibration method for seawater radionuclide detection provided by the invention is not limited by cumulative time and marine environment interference, the corresponding relation between a radionuclide channel and energy can be rapidly and accurately judged through field measurement, and the radionuclide detection accuracy is improved.
Description
technical field [0001] The invention belongs to the technical field of seawater detection and relates to an energy calibration method for seawater radionuclide detection. Background technique [0002] During the comprehensive measurement of marine radioactive substances, if there are corresponding radioactive substances, corresponding peaks will appear in the corresponding energy range. Due to the irregular drift of the peak of the detected radionuclide signal, the peak of the seawater radionuclide may drift, which will affect the detection results of the seawater radionuclide. Detecting the corresponding conversion relationship between channels and energy after seawater radioactive nuclear drift is necessary for the efficiency of marine radioactivity measurement, and is the core of the development of domestic marine radioactivity measurement. [0003] The existing seawater radioactive environmental monitoring methods are usually based on the assumption that the detection s...
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IPC IPC(8): G01T1/36
CPCG01T1/36
Inventor 程岩张颖颖吴丙伟刘东彦侯广利张颖冯现东
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI