Demonstration of laser-produced neutron diagnostic by radiative capture gamma-rays

Xiaopeng Zhang, Wenqing Wei, Changbo Fu, Xiaohui Yuan, Songhai An, Yanqing Deng, Yuan Fang, Jian Gao, Xulei Ge, Bing Guo, Chuangye He, Peng Hu, Neng Hua, Weiman Jiang, Liang Li, Mengting Li, Yifei Li, Yutong Li, Guoqiang Liao, Feng LiuLongxiang Liu, Hongwei Wang, Pengqian Yang, Su Yang, Tao Yang, Guoqiang Zhang, Yue Zhang, Baoqiang Zhu, Xiaofeng Xi, Jianqiang Zhu, Zhengming Sheng, Jie Zhang

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Abstract

We report a new scenario of time-of-flight (TOF) technique in which fast neutrons and delayed gamma-ray signals were both recorded in a millisecond time window in harsh environments induced by high-intensity lasers. The delayed gamma signals, arriving far later than the original fast neutron and often being ignored previously, were identified to be the results of radiative captures of thermalized neutrons. The linear correlation between gamma photon number and the fast neutron yield shows that these delayed gamma events can be employed for neutron diagnosis. This method can reduce the detecting efficiency dropping problem caused by prompt high-flux gamma radiation, and provides a new way for neutron diagnosing in high-intensity laser-target interaction experiments.
Original languageEnglish
Number of pages7
JournalReview of Scientific Instruments
Publication statusAccepted/In press - 31 Jan 2018

Keywords

  • time-of-flight (TOF)
  • high intensity lasers
  • delayed gamma-ray signals
  • neutron diagnosis

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