强激光与粒子束, 2013, 25 (11): 3045, 网络出版: 2013-11-14   

伴随粒子法γ能谱本底测量技术

Research on γ background spectra in associated particle technique
作者单位
中国工程物理研究院 核物理与化学研究所, 四川 绵阳 621900
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。
Abstract
To eliminate the influence of the random background γ spectra on the prompt γ spectra in the associated particle technique,the random background γ spectra induced by non-tagged neutrons and the prompt γ spectra induced by tagged neutrons were studied in experiment. Measurements of the random background γ spectra in different condition were analyzed. The methods of acquiring random γ spectra were proposed for the bulk and small sample of different substances. For small sample,the background γ spectra can be obtained without the sample by selecting the same time window as in measuring the prompt γ spectra with the sample. In the case of the tagged neutron range less than the volume of the sample, the background γ spectra can be obtained with the sample by selecting the time window during the random time.
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安力, 何铁, 郑普, 王新华, 郭海萍, 阳剑, 朱传新, 牟云峰. 伴随粒子法γ能谱本底测量技术[J]. 强激光与粒子束, 2013, 25(11): 3045. An Li, He Tie, Zheng Pu, Wang Xinhua, Guo Haiping, Yang Jian, Zhu Chuanxin, Mu Yunfeng. Research on γ background spectra in associated particle technique[J]. High Power Laser and Particle Beams, 2013, 25(11): 3045.

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