Method for measuring neutrons of boron-doped glass

Abstract

The invention provides a method for measuring neutrons of boron-doped glass. A glass scintillator mixed with boron of a preset proportion is reacted with an incoming neutron, energy released by the reaction is lost in a glass material to enable a nucleus of the glass material to be in an excited state, and a certain number of photons are emitted during deexcitation; optical signals are transmittedto a photomultiplier tube through the glass, and converted electrical signals are recorded; and neutron dose equivalents are obtained by multiplying the electrical signals by a fluence-dose conversion coefficient. According to the method for measuring the neutrons of the boron-doped glass, based on the low cost, easy processing, changeable size, acid and alkali resistance, and corrosion resistance of the glass, after a certain proportion of boron material is added, a good neutron sensitive material can be provided, the cost of neutron measurement can be decreased, the identifying capability of n and gamma is good, and adaptability to high temperature, high humidity, corrosion, and other harsh environment is good.

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 boron-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-ex...

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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