right 222 rn, 220 Calibration method for detection efficiency of rn progeny α decay

Abstract

a pair 222 Rn, 220 The calibration method of the detection efficiency of Rn's daughter α decay is to add barrier films with different thicknesses to the surfaces of three solid nuclear track detectors. 222 Rn, 220 The detection efficiencies of different daughters of Rn α decay are calibrated, for 222 Rn daughters, the main measurement of solid nuclear track detector 218 Po, 214 The ɑ particles produced by Po decay with energies of 6 MeV and 7.69 MeV respectively; 220 Rn daughters, the main measurement of solid nuclear track detector 212 Bi, 212 The Po decay produces ɑ particles with energies of 6.05 MeV and 8.78 MeV, respectively. Utilize the method provided by the present invention to 222 Rn, 220 The α-decay detection efficiency of different daughters of Rn is calibrated, the whole measurement process and calculation method are simple, and can quickly obtain 222 Rn, 220 Rn daughter α decay detection efficiency.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method for detecting radiation after coating the surface of a solid nuclear track detector. 222 Rn, 220 A method for calibrating the detection efficiency of Rn daughter α decay. Background technique [0002] in the air 222 Rn, 220 Rn is the main source of natural radiation received by human beings. 222 Rn, 220 The daughter body of Rn is deposited in the respiratory system, and the high-energy α particles emitted by its further decay cause damage to human cells. in the air 222 Rn, 220 The measurement of daughters of Rn generally adopts filter membrane sampling, and then obtains the concentration of different daughters by energy spectrum measurement, but this method can only obtain the concentration of daughters with a short sampling time. The solid state nuclear track detector can be used to measure 222 Rn, 220 Concentrations of Rn from several days...

AI Technical Summary

Problems solved by technology

in the air 222 Rn, 220 The daughter body measurement of Rn generally adopts filter membrane sampling, and then obtains the concentration of different daughter bodies by energy spectrum measurement, but this method can only obtain the daughter body concentration of a shorter sampling time

The solid state nuclear track detector can be used to measure 222 Rn, 220 Concentrations of Rn from several days to hundreds of days, but conventional measurement methods cannot distinguish 222 Rn, 220 Rn and its daughters

Currently, according to 222 Rn, 220 The energy of the daughter bodies of Rn is different. Some researchers have begun to use the method of adding film barriers on the surface of solid nuclear track detectors to identify energy. 222 Rn, 220 Rn daughter α decay detection efficiency is calibrated, but the existing calibration method is relatively complicated

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