Method and system for calculating optimal time of isotope irradiation of reactor

Abstract

The invention provides a method and system for calculating the optimal time of reactor isotope irradiation, and the method comprises the steps: obtaining a reaction chain of a determined target piece used for producing a target isotope in a reactor irradiation process; obtaining a calculation formula of the variation trend of the yield or the specific activity of each isotope on the reaction chain along with time; determining the optimal irradiation duration of the target isotope based on a calculation formula of the variation trend of the yield or the specific activity of each isotope on the reaction chain along with time; the optimal irradiation duration of the isotope is accurately obtained; a solid foundation is laid for calculation of the optimal duration of the reactor irradiation isotope, and following and reference are provided for optimization of the irradiation time of the isotope target reactor.

Description

Technical Field

[0001] The present application relates to the technical field of isotope generation, and in particular to a method and system for calculating the optimal time of reactor isotope irradiation. Background Art

[0002] Isotope production is of great significance, and it is related to many fields such as scientific research, medical diagnosis and treatment, industrial development, and national security. For example, stable isotopes such as carbon-13 and xenon-124 are used to label important molecules in living cells and biochemical reactions to understand their metabolism and biological processes; cesium-177 and iodine-125 are used to treat prostate cancer, lymphoma, and thyroid diseases; boron-11 is used as a dopant for semiconductor devices to effectively improve the radiation resistance and anti-interference capabilities of electronic equipment; some radioactive isotopes are used in nuclear weapons, nuclear power generation, radiation protection, and nuclear accident emergency response. They are an important part of national security and provide a strong guarantee for the country's nuclear safety. Isotope production has also brought significant economic and social benefits. Its industry has become an emerging industry with broad market prospects and huge potential, which has not only promoted the development of related industrial chains, but also driven employment and economic growth.

[0003] The reactor is a strong neutron source. By placing an appropriate object containing the relevant atomic nuclei (called target material) into the active region of the reactor and bombarding the target material with neutrons, the relevant atomic nuclei undergo nuclear reactions to produce radioactive isotopes. The bombarded object is called the target, and the target material is called the target material. In the reactor, commonly used nuclear reactions include (n, γ), (n, a) and (n, p) reactions, which can convert stable isotopes in the target into radioactive isotopes.

[0004] The radioactive isotopes produced by the above-mentioned reactor irradiation will accumulate as the irradiation time increases during the production process, and will disappear due to their own decay or other nuclear reactions. Their output will often gradually reach saturation from zero, that is, there is an optimal irradiation time. After this time, their output will basically no longer increase, and there is little point in continuing irradiation in the reactor. Due to the different half-lives, nuclear reaction cross sections, and neutron injection rates of radioactive isotopes, the optimal irradiation times of radioactive isotopes vary greatly. Therefore, it is necessary to find a method for calculating the optimal irradiation time of reactor isotopes and establish a system to accurately calculate the optimal irradiation time of various isotopes, provide a reference for the efficient irradiation production of isotopes, and guide the irradiation production of isotopes to generate the greatest economic benefits. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, the first purpose of the present application is to propose a method for calculating the optimal time of reactor isotope irradiation, so as to accurately obtain the optimal duration of isotope irradiation and provide a reference for the efficient irradiation production of isotopes.

[0007] The second object of the present application is to provide a system for calculating the optimal time of reactor isotope irradiation.

[0008] The third objective of the present application is to provide an electronic device.

[0009] A fourth objective of the present application is to provide a computer-readable storage medium.

[0010] A fifth object of the present application is to provide a computer program product.

[0011] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for calculating the optimal time of reactor isotope irradiation, comprising:

[0012] Obtaining the determined reaction chain of the target used to produce the target isotope during the reactor irradiation process;

[0013] A calculation formula for obtaining the change trend of the yield or specific activity of each isotope in the reaction chain over time;

[0014] Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, the optimal irradiation time of the target isotope is determined.

[0015] In some implementations, obtaining a determined reaction chain of a target for producing a target isotope during a reactor irradiation process includes:

[0016] Determining the multiple isotopes produced and the relationship between the multiple isotopes based on the nuclear reaction and / or self-decay of the target corresponding to the target isotope during the reactor irradiation production process;

[0017] Based on the generated multiple isotopes and the relationship between the multiple isotopes, a reaction chain of the target for producing the target isotope during the reactor irradiation process is determined.

[0018] In some implementations, the calculation formula for obtaining the change trend of the yield or specific activity of each isotope in the reaction chain over time includes:

[0019] Obtaining an equation for the change of the nucleon number of each isotope in the reaction chain over time;

[0020] Solving the equation of the change of the nucleon number of each isotope in the reaction chain with time to obtain a calculation equation for the nucleon number of each isotope in the reaction chain;

[0021] Determine a calculation formula for the specific activity of each isotope based on a calculation equation for the number of nucleons of each isotope in the reaction chain;

[0022] Based on the calculation formula of the specific activity of each isotope, a calculation formula for the change trend of the yield of each isotope in the reaction chain over time is obtained.

[0023] In some implementations, the determining the optimal irradiation duration of the target isotope based on a calculation formula of a change trend of the yield or specific activity of each isotope in the reaction chain over time comprises:

[0024] Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, a curve of the change of the yield or specific activity of the target isotope over time is obtained;

[0025] Based on the curve of the yield or specific activity of the target isotope changing with time, the optimal irradiation time of the target isotope is determined.

[0026] In some implementations, determining the optimal irradiation duration of the target isotope based on a curve of the yield or specific activity of the target isotope changing over time comprises:

[0027] Based on a curve of the yield or specific activity of the target isotope changing over time, obtaining a slope change trend of the curve;

[0028] Based on the slope variation trend of the curve, the optimal irradiation time of the target isotope is determined.

[0029] In some implementations, determining the optimal irradiation duration of the target isotope based on the slope change trend of the curve includes:

[0030] Obtaining a time point range at which the slope change rate of the curve meets a preset threshold;

[0031] According to the time point range, the optimal irradiation duration of the target isotope is determined.

[0032] In some implementations, the parameters in the calculation formula for the variation trend of the yield or specific activity of each isotope in the reaction chain over time include the neutron capture cross section, half-life, decay constant and molar mass of each isotope in the reaction chain.

[0033] In some implementations, the method is applied to an isotope irradiation optimal time calculation system.

[0034] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a system for calculating the optimal time of reactor isotope irradiation, comprising:

[0035] A reaction chain acquisition module, used for acquiring a reaction chain of a target for producing a target isotope during the irradiation process of a reactor;

[0036] A formula acquisition module, used to obtain a calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time;

[0037] The time calculation module is used to determine the optimal irradiation time of the target isotope based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time.

[0038] In some implementations, obtaining a determined reaction chain of a target for producing a target isotope during a reactor irradiation process includes:

[0039] Determining the multiple isotopes produced and the relationship between the multiple isotopes based on the nuclear reaction and / or self-decay of the target corresponding to the target isotope during the reactor irradiation production process;

[0040] Based on the generated multiple isotopes and the relationship between the multiple isotopes, a reaction chain of the target for producing the target isotope during the reactor irradiation process is determined.

[0041] In some implementations, the reaction chain acquisition module is specifically used to

[0042] Obtaining an equation for the change of the nucleon number of each isotope in the reaction chain over time;

[0043] Solving the equation of the change of the nucleon number of each isotope in the reaction chain with time to obtain a calculation equation for the nucleon number of each isotope in the reaction chain;

[0044] Determine a calculation formula for the specific activity of each isotope based on a calculation equation for the number of nucleons of each isotope in the reaction chain;

[0045] Based on the calculation formula of the specific activity of each isotope, a calculation formula for the change trend of the yield of each isotope in the reaction chain over time is obtained.

[0046] In some implementations, the formula acquisition module is specifically used to:

[0047] Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, a curve of the change of the yield or specific activity of the target isotope over time is obtained;

[0048] Based on the curve of the yield or specific activity of the target isotope changing with time, the optimal irradiation time of the target isotope is determined.

[0049] In some implementations, when determining the optimal irradiation duration of the target isotope based on a curve of the yield or specific activity of the target isotope changing with time, the time calculation module is used to:

[0050] Based on a curve of the yield or specific activity of the target isotope changing over time, obtaining a slope change trend of the curve;

[0051] Based on the slope variation trend of the curve, the optimal irradiation time of the target isotope is determined.

[0052] In some implementations, when determining the optimal irradiation duration of the target isotope based on the slope change trend of the curve, the time calculation module is used to:

[0053] Obtaining a time point range at which the slope change rate of the curve meets a preset threshold;

[0054] According to the time point range, the optimal irradiation duration of the target isotope is determined.

[0055] In some implementations, the parameters in the calculation formula for the variation trend of the yield or specific activity of each isotope in the reaction chain over time include the neutron capture cross section, half-life, decay constant and molar mass of each isotope in the reaction chain.

[0056] In some implementations, the method is applied to an isotope irradiation optimal time calculation system.

[0057] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect.

[0058] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a computer-readable storage medium, in which computer-readable storage medium is stored computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in the first aspect.

[0059] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor.

[0060] The present application provides a method, device, electronic device and storage medium for calculating the optimal time for reactor isotope irradiation. By determining the reaction chain of the isotope target, a calculation formula for the yield or specific activity of each isotope in the reaction chain over time is derived, and the optimal irradiation time of the isotope is accurately obtained according to the calculation formula. This lays a solid foundation for calculating the optimal time for reactor irradiation of isotopes, and provides compliance and reference for optimizing the irradiation time of isotope targets in reactors.

[0061] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0063] Figure 1 A schematic flow chart of a method for calculating the optimal time of reactor isotope irradiation provided in an embodiment of the present application;

[0064] Figure 2 A schematic diagram of a reaction chain of an isotope target provided as an example of the present application;

[0065] Figure 3 A schematic diagram of a reaction chain of an isotope target provided as another example of the present application;

[0066] Figure 4 A trend diagram of the change in specific activity of an isotope provided as an example of the present application;

[0067] Figure 5 A block diagram of a system for calculating the optimal time of reactor isotope irradiation provided in an embodiment of the present application;

[0068] Figure 6 A block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0069] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0070] The following describes the method, device and equipment for calculating the optimal time of reactor isotope irradiation according to the embodiments of the present application with reference to the accompanying drawings.

[0071] Figure 1A schematic flow chart of a method for calculating the optimal time for reactor isotope irradiation provided in an embodiment of the present application.

[0072] It should be noted that the executor of the method for calculating the optimal time of reactor isotope irradiation in the embodiment of the present application is the calculation system for the optimal time of reactor isotope irradiation in the embodiment of the present application. The calculation system for the optimal time of reactor isotope irradiation can be configured in an electronic device so that the electronic device can execute the calculation function of the optimal time of reactor isotope irradiation.

[0073] like Figure 1 As shown, the method for calculating the optimal time of reactor isotope irradiation includes the following steps:

[0074] Step S101, obtaining a reaction chain of a target for producing a target isotope during reactor irradiation.

[0075] As an implementation method, a method for determining a reaction chain includes: determining multiple isotopes produced and the relationship between the multiple isotopes based on the nuclear reaction and / or self-decay of the target corresponding to the target isotope during the reactor irradiation production process; based on the multiple isotopes produced and the relationship between the multiple isotopes, obtaining a determined reaction chain of the target used to produce the target isotope during the reactor irradiation process.

[0076] It should be noted that the present invention produces isotopes through a reactor, that is, the neutrons in the reactor are used to irradiate the nuclides in the target to generate the required isotopes. During the irradiation process, the target often undergoes a series of nuclear reactions or decays itself to form a variety of isotopes (also called nuclides), which is called the reaction chain of isotope irradiation production, that is, the reaction chain of the target required to produce the target isotope during the reactor irradiation process. In this reaction chain, there is a definite relationship between the isotopes. Therefore, in order to obtain an accurate isotope yield, it is necessary to analyze the reaction chain of the isotope so as to lay a foundation for the theoretical calculation of the isotope yield.

[0077] For example, the radioisotopes commonly used in medicine 131 I. 177 Lu target material 130 Te, 176 The reaction chain of Yb is analyzed and explained. The reaction chain analysis of other isotopes can be implemented by reference and will not be described in detail.

[0078] 1) 130 Reaction chain of Te

[0079] 131 I has a half-life of 8.02 days, and 100% of it decays to 131Xe, the maximum energy of β-ray is 606.5keV, which can be used to treat thyroid diseases, and its γ-ray can be used to scan organs such as thyroid, liver, and lungs, as well as to measure the function of organs such as kidney and thyroid. 130 TeO 2 Powder pressed tablets are used as irradiation target materials. 130 Te(n,γ) 131 Te generation 131 Te, 131 Te decays into 131 I, 131 I decays into 131 Xe, 131 I can also 131 I(n,γ) 132 I disappears. 130 Te is used as target to produce isotopes 131 The reaction chain of I is as follows Figure 2 As shown:

[0080] 2) 176 Yb reaction chain

[0081] 177 Lu is a low-energy β-nuclides with a half-life of 6.7 days. It emits β-particles with energies of 497keV (78.6%), 384keV (9.1%), and 176keV (12.2%), with an average energy of 130keV. During the decay process, in addition to emitting b-particles, g-rays are also emitted. B-particles have strong penetrating power and can directly irradiate local tumor cells, thereby achieving targeted treatment; while g-rays can be used for imaging to help doctors monitor the treatment effect. 176 Yb(n,γ) 177 Yb generation 177 Yb, 177 Yb decays into 177 Lu, 177 Lu decays into 177 Hf, 177 Lu can also 177 Lu(n,γ) 178 Lu disappeared. 176 Yb is used as target to produce isotopes 177 Lu's reaction chain is as follows Figure 3 shown.

[0082] Step S102, obtaining a calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time.

[0083] As an implementation method, a method for obtaining a calculation formula for the change trend of the yield or specific activity of each isotope in a reaction chain over time; comprising: obtaining an equation for the change of the nucleon number of each isotope in the reaction chain over time; solving the equation for the change of the nucleon number of each isotope in the reaction chain over time to obtain a calculation formula for the nucleon number of each isotope in the reaction chain; based on the calculation formula for the nucleon number of each isotope in the reaction chain, determining a calculation formula for the specific activity of each isotope; based on the calculation formula for the specific activity of each isotope, obtaining a calculation formula for the change trend of the yield of each isotope in the reaction chain over time.

[0084] In some embodiments, the parameters in the calculation formula for the variation trend of the yield or specific activity of each isotope in the reaction chain over time include the neutron capture cross section, half-life, decay constant and molar mass of each isotope in the reaction chain.

[0085] Below 176 Yb is used as target to produce isotopes 177 Lu's reaction chain is used as an example to illustrate 177 The derivation method of the calculation formula for the change of the specific activity of Lu isotope with time is similar to the calculation method of the specific activity of other isotopes, so we will not give examples one by one.

[0086] 176 Yb, 177 Yb and 177 The neutron capture cross section, half-life, decay constant and molar mass of Lu are shown in Table 1.

[0087] Table 1: 177 Calculation parameters related to Lu specific activity

[0088]

[0089] According to 176 Yb is used as target to produce isotopes 177 Lu's reaction chain can produce nuclides 176 Yb, 177 Yb and 177 The equation for the change of Lu's nucleon number with time is:

[0090]

[0091]

[0092]

[0093] Among them, N 1 (t) = 4.441 × 10 20 , N 2 (0) = 0, N 3 (0)=0, is the neutron injection rate of the reactor irradiation channel, λ 2 and λ 3 Nuclide 177 Yb and nuclides 177 Lu decay constant, σ 1 and σ 3 Nuclide 176 Yb and nuclides 177 Neutron capture cross section of Lu.

[0094] Solving the above formula, we get:

[0095]

[0096]

[0097]

[0098] The calculation formula of specific activity A (Ci / g) is as follows:

[0099] A(Bq / g)=λ×N

[0100] A(Ci / g)=A(Bq / g) / 3.7E+10

[0101] Therefore, the above method can be used to obtain a calculation formula for the change trend of the specific activity of each isotope in the reaction chain over time.

[0102] It should be noted that the unit of yield is g and the unit of specific activity is Ci / g, but the trend changes of the two are exactly the same.

[0103] Step S103, determining the optimal irradiation time of the target isotope based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time.

[0104] As an implementation method, a method for determining the optimal irradiation time of a target isotope based on a calculation formula for the change trend of the yield or specific activity of each isotope in a reaction chain over time; comprising: obtaining a curve of the yield or specific activity of the target isotope changing over time based on the calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time; determining the optimal irradiation time of the target isotope based on the curve of the yield or specific activity of the target isotope changing over time.

[0105] As an implementation method, a method for obtaining a curve of the yield or specific activity of a target isotope changing with time based on a calculation formula for the change trend of the yield or specific activity of each isotope in a reaction chain over time; comprising: establishing an isotope irradiation optimal time calculation system based on the calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time; setting parameter values ​​of parameters in the calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time, and based on the parameter values, obtaining a curve of the yield or specific activity of the target isotope changing with time through the isotope irradiation optimal time calculation system.

[0106] In some embodiments, a method for establishing an isotope irradiation optimal time calculation system is provided based on a calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time; comprising: writing a code in a selected programming language to implement the calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time, and establishing an isotope irradiation optimal time calculation system.

[0107] Therefore, based on the calculation formula for the changing trend of the yield or specific activity of each isotope in the reaction chain over time, an isotope irradiation optimal time calculation system was developed and established, so that the changing trend of the specific activity or yield of various radioactive isotopes can be automatically calculated through the system.

[0108] In some embodiments, the steps involved in establishing an isotope irradiation optimal time calculation system include: first, defining the optimal irradiation time variable of the isotope; then determining that the target output of the calculation system is the changing trend of the isotope specific activity or yield with the irradiation time and the criterion for the optimal irradiation time; next, selecting a calculation formula for the specific activity or yield of each isotope or the changing trend of the specific activity with time; selecting a programming language, for example, Python, R, MATLAB, Java, etc.; designing the computing system architecture, including modules such as input processing, formula calculation, and result output; finally, using the selected programming language to write code to implement formula calculation.

[0109] In some embodiments, a curve of yield or specific activity varying with time is based on a curve of yield or specific activity varying with time of the target isotope, and a method for determining the optimal irradiation duration of the target isotope; comprising: based on the curve of yield or specific activity varying with time of the target isotope, obtaining the slope change trend of the curve; based on the slope change trend of the curve, determining the optimal irradiation duration of the target isotope.

[0110] In some implementations, the method in which the time calculation module determines the optimal irradiation duration of the target isotope based on the slope change trend of the curve includes: obtaining a time point range in which the slope change rate of the curve meets a preset threshold; and determining the optimal irradiation duration of the target isotope based on the time point range.

[0111] The following is also 176 Yb is used as target to produce isotopes 177 Taking Lu's reaction chain as an example, we get 177 The changing trend of the Lu isotope yield is similar to that of other isotope yields, so they will not be listed one by one.

[0112] Input the assumed neutron injection rate of the reactor irradiation channel into the isotope irradiation optimal time calculation system Get isotope 177 The variation trend of Lu specific activity over time, such as Figure 4 shown.

[0113] It should be noted that the neutron injection rate of the reactor irradiation channel is related to the isotope yield and the optimal irradiation time. In actual calculation, it can be input according to the specific irradiation channel. When t = 22.24d, 177 The specific activity of Lu is about 1.5407 Ci / g.

[0114] according to Figure 4 The trend graph of the specific activity of the isotope shown in the figure can be used to calculate the optimal irradiation time of the isotope by the isotope irradiation optimal time calculation system. The system can make a judgment based on the slope change trend of the curve in the trend graph. 177 Lu as an example, the neutron injection rate in the irradiation channel Under the condition of high temperature, the optimal irradiation time is 22-23 days.

[0115] The method for calculating the optimal time for reactor isotope irradiation in the embodiment of the present application determines the reaction chain of the isotope target, derives a calculation formula for the yield or specific activity of each isotope in the reaction chain over time, and accurately obtains the optimal irradiation time of the isotope based on the calculation formula; a solid foundation is laid for calculating the optimal time for reactor irradiation of isotopes, and a compliance and reference is provided for optimizing the irradiation time of isotope targets in reactors.

[0116] In order to implement the above-mentioned embodiment, the present application also proposes a system for calculating the optimal time of reactor isotope irradiation. Figure 5 A block diagram of a system for calculating the optimal time of reactor isotope irradiation provided in an embodiment of the present application. Figure 5 As shown, the calculation system for the optimal time of reactor isotope irradiation may include: a reaction chain acquisition module 501, a formula acquisition module 502 and a time calculation module 503.

[0117] The reaction chain acquisition module 501 is used to acquire the reaction chain of the target used to produce the target isotope during the reactor irradiation process;

[0118] A formula acquisition module 502 is used to obtain a calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time;

[0119] The time calculation module 503 is used to determine the optimal irradiation time of the target isotope based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time.

[0120] In some implementations, obtaining a determined reaction chain of a target for producing a target isotope during a reactor irradiation process includes:

[0121] Determine the multiple isotopes produced and the relationship between the multiple isotopes based on the nuclear reaction and / or self-decay of the target corresponding to the target isotope during the reactor irradiation production process;

[0122] Based on the generated multiple isotopes and the relationship between the multiple isotopes, a determined reaction chain of a target for producing a target isotope during reactor irradiation is obtained.

[0123] In some implementations, the reaction chain acquisition module 501 is specifically used to

[0124] Obtain the equation for the change of the nucleon number of each isotope in the reaction chain with time;

[0125] Solve the equation of the change of the nucleon number of each isotope in the reaction chain with time, and obtain the calculation equation of the nucleon number of each isotope in the reaction chain;

[0126] Based on the calculation equation of the number of nucleons of each isotope in the reaction chain, the calculation formula of the specific activity of each isotope is determined;

[0127] Based on the calculation formula of the specific activity of each isotope, a calculation formula for the change trend of the yield of each isotope in the reaction chain over time is obtained.

[0128] In some implementations, the formula acquisition module 502 is specifically configured to:

[0129] Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, a curve of the yield or specific activity of the target isotope changing with time is obtained;

[0130] The curve of yield or specific activity variation over time is based on the curve of yield or specific activity variation over time of the target isotope, and the optimal irradiation time of the target isotope is determined.

[0131] In some implementations, the time calculation module 503 determines the optimal irradiation duration of the target isotope based on the yield or specific activity versus time curve of the target isotope;

[0132] The curve of yield or specific activity changing with time is based on the curve of yield or specific activity changing with time of the target isotope, and the slope change trend of the curve is obtained;

[0133] Based on the slope change trend of the curve, the optimal irradiation time of the target isotope is determined.

[0134] In some implementations, when determining the optimal irradiation duration of the target isotope based on the slope variation trend of the curve, the time calculation module 503 is configured to:

[0135] Obtaining a time point range at which the slope change rate of the curve meets a preset threshold;

[0136] According to the time point range, the optimal irradiation duration of the target isotope is determined.

[0137] In some implementations, the parameters in the calculation formula for the variation trend of the yield or specific activity of each isotope in the reaction chain over time include the neutron capture cross section, half-life, decay constant and molar mass of each isotope in the reaction chain.

[0138] It should be noted that the aforementioned explanation of the embodiment of the method for calculating the optimal time of reactor isotope irradiation is also applicable to the calculation system for the optimal time of reactor isotope irradiation of this embodiment, and will not be repeated here.

[0139] In order to implement the above embodiment, the present application also proposes an electronic device. Figure 6 , Figure 6 is a block diagram of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the electronic device 600 includes: a processor 601, and a memory 602 communicatively connected to the processor 601; the memory 602 stores computer-executable instructions; the processor 601 executes the computer-executable instructions stored in the memory to implement the method provided in the aforementioned embodiment.

[0140] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0141] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0142] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0143] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0144] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0145] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0146] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0147] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0148] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0149] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for calculating the optimal time of reactor isotope irradiation, characterized in that: The following steps are involved: Obtaining the determined reaction chain of the target used to produce the target isotope during the reactor irradiation process; A calculation formula for obtaining the change trend of the yield or specific activity of each isotope in the reaction chain over time; Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, the optimal irradiation time of the target isotope is determined.

2. The method according to claim 1, characterized in that The step of obtaining a determined reaction chain of a target for producing a target isotope during reactor irradiation comprises: Determining the multiple isotopes produced and the relationship between the multiple isotopes based on the nuclear reaction and / or self-decay of the target corresponding to the target isotope during the reactor irradiation production process; Based on the generated multiple isotopes and the relationship between the multiple isotopes, a reaction chain of the target for producing the target isotope during the reactor irradiation process is determined.

3. The method according to claim 1, characterized in that The calculation formula for obtaining the change trend of the yield or specific activity of each isotope in the reaction chain over time includes: Obtaining an equation for the change of the nucleon number of each isotope in the reaction chain over time; Solving the equation of the change of the nucleon number of each isotope in the reaction chain with time to obtain a calculation equation for the nucleon number of each isotope in the reaction chain; Determine a calculation formula for the specific activity of each isotope based on a calculation equation for the number of nucleons of each isotope in the reaction chain; Based on the calculation formula of the specific activity of each isotope, a calculation formula for the change trend of the yield of each isotope in the reaction chain over time is obtained.

4. The method according to claim 1, characterized in that: The method of determining the optimal irradiation duration of the target isotope based on a calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time comprises: Based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time, a curve of the change of the yield or specific activity of the target isotope over time is obtained; Based on the curve of the yield or specific activity of the target isotope changing with time, the optimal irradiation time of the target isotope is determined.

5. The method according to claim 4, characterized in that The step of determining the optimal irradiation duration of the target isotope based on a curve of the yield or specific activity of the target isotope changing with time comprises: Based on a curve of the yield or specific activity of the target isotope changing over time, obtaining a slope change trend of the curve; Based on the slope variation trend of the curve, the optimal irradiation time of the target isotope is determined.

6. The method according to claim 5, characterized in that The step of determining the optimal irradiation duration of the target isotope based on the slope variation trend of the curve comprises: Obtaining a time point range at which the slope change rate of the curve meets a preset threshold; According to the time point range, the optimal irradiation duration of the target isotope is determined.

7. The method according to claim 1, characterized in that The parameters in the calculation formula for the variation trend of the yield or specific activity of each isotope in the reaction chain over time include the neutron capture cross section, half-life, decay constant and molar mass of each isotope in the reaction chain.

8. The method according to claim 1, characterized in that The method is applied to an isotope irradiation optimal time calculation system.

9. A system for calculating the optimal time of reactor isotope irradiation, characterized in that: include: A reaction chain acquisition module, used for acquiring a determined reaction chain of a target for producing a target isotope during the reactor irradiation process; A formula acquisition module, used to obtain a calculation formula for the change trend of the yield or specific activity of each isotope in the reaction chain over time; The time calculation module is used to determine the optimal irradiation time of the target isotope based on the calculation formula of the change trend of the yield or specific activity of each isotope in the reaction chain over time.

10. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 8.

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