伴随粒子法γ能谱本底测量技术  

Research onγbackground spectra in associated particle technique

作　　者：安力[1] 何铁[1] 郑普[1] 王新华[1] 郭海萍[1] 阳剑[1] 朱传新[1] 牟云峰[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2013年第11期3045-3049,共5页High Power Laser and Particle Beams

基　　金：科工局推广专项

摘　　要：为了解决伴随粒子法瞬发γ能谱实验中随机γ本底的影响,通过实验研究了"标记"中子和非"标记"中子与物质作用产生的瞬发γ信号和随机γ本底信号。对不同情况随机本底γ谱测量进行了分析,提出了小尺度样品和大尺度样品本底测量方式。研究表明:对小尺度样品,可以通过去掉样品,选择与有样品测量的γ谱相同的时间窗进行本底测量;对于大尺度样品,可以通过在随机本底范围选取时间窗进行本底测量。To eliminate the influence of the random background 3＇ spectra on the prompt 3＇ spectra in the associated particle technique,the random background 3＇ spectra induced by non tagged neutrons and the prompt 7 spectra induced by tagged neutrons were studied in experiment. Measurements of the random background 3＇ spectra in different condition were analyzed. The methods of acquiring random 7 spectra were proposed for the bulk and small sample of different substances. For small sample,the back- ground spectra can be obtained without the sample by selecting the same time window as in measuring the prompt 3＇ spectra with the sample. In the case of the tagged neutron range less than the volume of the sample, the background 3＇ spectra can be obtained with the sample by selecting the time window during the random time.

关 键 词：D-T中子源 伴随α粒子技术 特征瞬发γ γ本底 

分 类 号：O571.5[理学—粒子物理与原子核物理]