Method and system for measuring reaction section of certain element generating certain nuclide

Abstract

The invention belongs to the technical field of nuclear data measurement, and particularly relates to a method and a system for measuring a reaction cross section of a certain element generating a certain nuclide, and the method comprises the following steps: preparing a sample, and carrying out neutron irradiation on the sample; then measuring the total count of all-energy peaks of characteristic gamma rays for generating the same nuclide in the sample after neutron irradiation; and finally, obtaining a generation section of a certain nuclide by using a calculation formula for generating a reaction section of a certain nuclide by a certain element. According to the method, the scientific definition of the reaction section of the certain element for generating the certain nuclide is given, the general calculation formula of the reaction section of the certain element for generating the certain nuclide is given, the formula principle is clear, the calculation is simple and rapid, and the calculation efficiency is high. The method has important significance in production of important isotopes, selection of reactor structure materials, relevant nuclear physics basic research and application research and the like.

Description

technical field [0001] The invention belongs to the technical field of nuclear data measurement, and in particular relates to a method and system for measuring the reaction cross section of a certain element to generate a certain nuclide. Background technique [0002] In the actual measurement of nuclear reaction cross sections, many problems are often encountered, such as the change of neutron flux, the mutual interference of various nuclear reactions, the mutual interference between γ rays with similar energy, and the cascade γ rays conforming to the additive effect. , sample geometry, γ-ray self-absorption and other correction problems. All these problems need to be solved reasonably in order to obtain accurate nuclear reaction cross-section measurement results. In the process of measuring the nuclear reaction cross section by the activation method, natural samples are usually used. If the sample elements contain multiple stable isotopes, the (n, p), (n, d), (n, np) whic...

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Problems solved by technology

Some researchers also mentioned "the formation cross section of a certain nuclide" or "element cross section", but did not give a clear definition of "the formation cross section of a certain nuclide" or "element cross section", and some researchers did not give how to calculate "Formation cross-section of a certain nuclide" or "element cross-section", and the calculation formulas given by some researchers have limitations

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