γ吸收剂量率在线探测用硅光电池的电学性能研究

摘要

建立了一种γ吸收剂量率实时在线测量系统，研究了半导体硅光电池BBZSGD‐4辐射光生电流和γ吸收剂量率之间的关系，并对其耐辐照性能进行了研究。60 Co γ辐照实验表明：半导体硅光电池BBZSGD‐4对60 Co的γ射线有较好的响应，其辐射光生电流与吸收剂量率的关系呈线性规律。当吸收剂量率为94.54 Gy／min时，辐射光生电流可达1.26μA。在吸收剂量率为50 Gy／min时，辐射光生电流随总吸收剂量的增加呈指数下降，总吸收剂量为5445.8 Gy时，其辐射光生电流衰减1％。半导体硅光电池BBZSGD‐4具有作为实时在线低吸收剂量率探测器的潜力。%The real‐time online monitoring system for γ‐ray absorbed dose rate was established to study the relationship between the photocurrent of semi‐conductive silicon photo‐cell BBZSGD‐4 and γ‐ray absorbed dose rate under the open circuit .The radioac‐tive experiments in 60 Co γ radiation field show that photo‐cell BBZSGD‐4 has good response to 60Co γ‐ray ,and their relationship accords with the linear law .The photo‐current of photo‐cell can be up to 1.26 μA when the absorbed dose rate is 94.54 Gy/min .The relationship between photocurrent and the absorbed dose accords with expo‐nential law w hen absorbed dose rate is 50 Gy/min ,and the attenuation of photocurrent is 1% when the absorbed dose is 5 445.8 Gy .Thus photo‐cell BBZSGD‐4 has the poten‐tial to be a real‐time detector to detect low absorbed dose rate in 60 Co γ radiation field .