Active neutron personal dosimeter based on three silicon detectors, and measurement method of active neutron personal dosimeter

Abstract

The invention relates to an active neutron personal dosimeter based on three silicon detectors, and a measurement method of the active neutron personal dosimeter. The personal dosimeter comprises a main detector, an outer transformant module, and a nuclear electronics system. The main detector and the outer transformant module comprise three passivation injection planar silicon detectors which aresequentially an Open detector, a Fast detector and an Albedo detector from the top to the bottom. A polyethylene layer and a 6LiF coating layer are disposed in front of the Open detector, a polyethylene layer is arranged in front of the Fast detector, and a boron-containing polyethylene layer, a polyethylene layer and a 6LiF coating layer are arranged in front of the Albedo detector. The nuclearelectronics system provides high voltages for all detectors, and obtains detection signals for multichannel analysis. The personal dosimeter provides two measurement modes. A direct reading mode can present the neutron fluence and personal dose equivalent information in real time, and a spectrum unfolding mode can give a more precise neutron field power spectrum. The personal dosimeter is wide inenergy measurement range, has the energy resolution capability, and can be used in an n-gamma mixed field.

Description

technical field [0001] The invention relates to neutron personal dosimeter technology, in particular to an active neutron personal dosimeter based on a three-layer silicon detector and a measurement method thereof. Background technique [0002] The more commonly used neutron personal dosimeter is CR-39 solid plastic track detector. After the plastic track detector is irradiated by neutrons, atoms such as C, H, and O in it collide with neutrons to generate recoil nuclei, and when the energy of the recoil nuclei is large enough, damage traces can be generated in the material. Then chemical etching or electrochemical etching is used to etch easily observable tracks in the detector material and observed under a microscope. This solid track personal dosimeter has the advantages of small size and no need for electronic equipment during measurement. But its shortcomings are also very obvious: 1. The lower limit of measurement is relatively high, about 100keV, which is determined ...

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Problems solved by technology

Therefore, only recording the number obviously cannot give a more accurate personal dose equivalent

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