Method for measuring neutrons by using gallium doped glass

Abstract

The invention provides a method for measuring neutrons by using gallium doped glass. The method comprises: reacting a glass scintillator doped with a predetermined proportion of gallium with incidentneutrons, so that the energy released by the reaction is lost in glass material; making an atomic nucleus of the glass material in an excited state, then emitting a certain number of photons when de excitation; transmitting an optical signal to a photomultiplier tube through the glass, recording a converted electrical signal; multiplying the electrical signal by a fluence-dose conversion coefficient to obtain a neutron dose equivalent. The method can provide an excellent neutron sensitive material after doping a certain proportion of gallium material into the glass based on the low cost, easyprocessing, changeable size, acid and alkali resistance, and corrosion resistance of the glass. Therefore, the method can reduce the cost of neutron measurement, has better n and gamma identificationcapability, and has good adaptability to severe environments such as high temperature, high humidity, and corrosion.

Description

technical field [0001] The invention belongs to the technical field of radiation measurement, and in particular relates to a method for measuring neutrons in gallium-doped glass. Background technique [0002] The main component of glass is SiO 2 , Transparency to visible light is its biggest feature, and it is widely used in various industries due to its good transparency and low optical signal attenuation. Glass can not only transmit optical signals, but also emit photons under special conditions. At the same time, it has the advantages of large or small size, low cost, and easy processing, so it has also attracted the attention of the radiation measurement industry. [0003] Add neutron-sensitive substances into the glass to form a neutron scintillator. These substances undergo a nuclear reaction with neutrons. The energy released by the reaction will make the atomic nuclei of the glass material in an excited state, and a certain number of photons will be emitted when de-...

AI Technical Summary

Problems solved by technology

The isotopes of Li that can be used for radiation measurement are Li-6 and Li-7, among which Li-7 is sensitive to gamma rays and can only be used for gamma measurement applications; while Li-6 not only has a larger reaction cross section with neutrons, but also Gamma rays are very sensitive, neutron and gamma signals must be distinguished when measuring neutrons, but in high-energy gamma components and strong gamma fields, it becomes extremely difficult because the pulse heights are almost the same

If Li-6 and Li-7 are used at the same time, two sets of test equipment will be required at the same time. For portable instruments, it will be more difficult due to the limitation of volume and weight

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