个人中子剂量气泡探测器研制

中子固体气泡探测器被认为是唯一能够满足国际辐射防护委员会ICRP60要求的个人中子剂量计，它具有从低能中子到高能中子的平坦响应曲线和对γ射线不灵敏的优点.本工作将过热液滴均匀地分布在一种软聚合物中，制成了个人中子气泡剂量计,其灵敏度达到每毫雷姆40个气泡.还介绍了个人中子剂量气泡探测器的原理和制作过程.Neutron solid bubble detector was considered as a unique one for meeting the need of the personal neutron dosimeter recommended by International Committee of radiation protection,ICRP60.It has the flat response for neutron from low energy to high energy,and insensitive for gamma rays. In this work,superheated liquid drops were dispersed into a kind of soft polymer homogeneously.A personal neutron bubble dosimeter has been made,and the sensitivity reached to about 40bubbles/mrem.The principle and the processing procedure of bubble detector were also introduced in this paper.     

瞬发γ活化分析系统的建立

瞬发γ中子活化分析是重要的核分析方法之一,是H和B等轻元素的重要分析手段,近年来应用范围不断增加.概要介绍了瞬发γ中子活化分析的基本原理,重点介绍了中国原子能科学研究院重水研究堆热中子束瞬发γ中子活化分析实验装置以及50 keV－11 MeV的宽能区γ效率刻度方法.还应用瞬发γ中子活化分析分析了海底锰结核标准物质GSPN 3中11种元素,结果与标准值基本一致.Neutron induced prompt γ activation analysis(PGNAA),is one of the nuclear analytical method,which is a powerful tool for H,B,etc.undestructive determination.The applications of PGNAA are increased in recent years.In this paper,the basic principle of PGNAA was introduced briefly.The facilities of PGNAA in HWRR of China Institute of Atomic Energy as well as the efficiency calibration for a wide range gamma from 50 keV to 10 MeV were emphasized.A deep sea polymetallic nodule CRM,GSPN 3 was analyzed by using PGNAA in this work,the results have agreement with the certified values.