Anti-universe ray system for internal exposure measurement and anti-coincidence method

Abstract

The invention belongs to the technical field of anti-universe rays and concretely relates to an anti-universe ray system for internal exposure measurement and an anti-coincidence method. The anti-universe ray system for internal exposure measurement comprises an anti-coincidence detector disposed in a shielding chamber having a high-purity germanium detector and an electronics device arranged outside the shielding chamber and connected with the anti-coincidence detector and the high-purity germanium detector, wherein the electronics device has an anti-coincidence circuit and a multi-channel analyzer; the anti-coincidence detector can detect external cosmic ray signals; and the high-purity germanium detector can be applied to internal exposure measurement. Current internal exposure measurement has high background due to the effect by cosmic rays; by the use of the anti-universe ray system for internal exposure measurement and the anti-coincidence method, internal exposure monitoring background can be reduced and detection lower limit can be improved; acceptable daily intake amount of radioactive medicine by a testee during the internal exposure measurement can be reduced with the achievement of effective measuring effect; and radiation injury of the testee can be reduced.

Description

technical field [0001] The invention belongs to the technical field of anti-cosmic rays, and in particular relates to an anti-cosmic ray system and an anti-coincidence method for internal irradiation measurement. Background technique [0002] The current internationally recommended method for internal irradiation living body measurement is to use HPGe detectors (high-purity germanium detectors) or their arrays (radioactive nuclides enter the organism, and the organisms are exposed to internal radiation called internal irradiation). The measurement is carried out in an environment ("background" refers to the relatively stable radiation level or sound volume formed by the environment). The low-background environment mainly uses a shielding room to effectively shield radioactive particles and soft components in cosmic rays in the surrounding environment. The hard components in cosmic rays, such as high-energy muons (muons), have strong penetrating ability. After passing throug...

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Problems solved by technology

[0004] Aiming at the problem that cosmic rays and the secondary particles produced (hard components in cosmic rays, such as high-energy muons) cause the internal background of the shielding room used for internal irradiation to be relatively high, the present invention adopts the anti-cosmic method of establishing a large-area scintillator. ray system and the corresponding anti-coincidence method to solve

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