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用热释光探测器对快堆堆外n ,γ混合场进行了区分测量 ,结果表明 :该方法可有效的检测出n ,γ混合场的γ成分 ;为了更较精确地测量快堆n ,γ混合场γ光子注量 ,提出了采用新配方的热释光探测器LiFTLD(6 LiF ,7LiF各占5 0 % )与6 LiFTLD成对使用的方法 .考虑到LiFTLD对中子吸收剂量的响应存在LET效应 ,对LiF(Mg ,Cu ,P)TLD进行了中子响应的LET效应因子RLET的实验测定 (RLET≈ 0 0 5 ) ,在此基础上 ,对6 LiF 7LiFTLD的成对使用测量快中子堆的n ,γ混合场中光子注量的方法进行了实验研究 .实验结果表明 ,混合场中的中子在7LiF(Mg ,Cu ,P)中产生的热释光量 (TL)占n ,γ产生的总TL的 8 1%— 17 1% .实验结果表明该方法是行之有效的 .为钝化中子谱的不确定性所致的影响 ,进一步提高γ光子注量测量结果的精度 ,提出了采用新配方的LiFTLD(6 LiF ,7LiF各占 5 0 % )与6 LiFTLD成对使用测量快堆n ,γ混合场γ光子注量的方法 .
The results show that this method can effectively detect the γ component of the mixed field of n and γ; in order to measure the fast reactor n more accurately, γ hybrid field γ-photon flux, a new method of using LiFTLD (6 LiF, 50% of 7LiF) with 6 LiFTLD was proposed.According to the response of LiFTLD to neutron absorbed dose The LET effect exists in the LiF (Mg, Cu, P) TLD, and the neutron-responsive LET effect factor RLET (RLET≈0 05) is measured. Based on this, the pairwise measurement of 6 LiF 7LiFTLD The experimental results show that the amount of TL (TL) generated in 7LiF (Mg, Cu, P) by neutrons in the mixed field accounts for , and the total TL produced by γ is 81% -171% .The experimental results show that this method is effective.It can further improve the effect of the γ-photon flume measurement on the passivation neutron spectrum uncertainty Accuracy, proposed using the new formula of LiFTLD (6 LiF, 7LiF each 50%) and 6 LiFTLD pairs used to measure fast reactor n, γ mixed field γ light Fluence approach.