Pulse-shaping method for real-time neutron/gamma discrimination at low sampling rates

• 作者： Jiaxin, Li ^1,2 Huiliang, Hou ^1,2 Yuefeng, Huang ^1,2 Maosong, Cheng ^1,2 Zhimin, Dai ^1,2
• 作者单位：
  1.  Shanghai Institute of Applied Physics, Chinese Academy of Sciences
  2.  University of Chinese Academy of Sciences
• 通讯作者： Huiliang, Hou  Email:houhuiliang@sinap.ac.cn Zhimin, Dai  Email:daizhimin@sinap.ac.cn
• 提交时间：2023-09-11

摘要: The NaI:Tl scintillator is an innovative material for dual-gamma-ray and neutron detection with a low 6Li concentration. To achieve real-time n/ discrimination, a zero-crossing time comparison algorithm based on trapezoidal pulse shaping was developed. The algorithm can operate efficiently at low sampling rates and was implemented on a single-probe portable digital n/ discriminator based on a feld-programmable gate array (FPGA). The discriminator and NaI:Tl,6Li detector were tested in a neutron-gamma mixed field produced by an 241Am-Be neutron source to evaluate the performance of the algorithm. The Figure of Merits (FoM) was measured as 2.88 at a sampling rate of 50 MHz, indicating that the discriminator with its embedded algorithm has a promising n/ discrimination capability. Efficient discrimination at sampling rates of 40 and 25 MHz demonstrates that the capability of this method is not limited by low sampling rates.

• 来自： 李嘉鑫
• 分类： 物理学 >> 核物理学
• 投稿状态： 已被期刊接收
• 引用： ChinaXiv:202309.00112 (或此版本 ChinaXiv:202309.00112V1)
  DOI:10.12074/202309.00112V1
  CSTR:32003.36.ChinaXiv.202309.00112.V1
• 推荐引用方式： Jiaxin, Li,Huiliang, Hou,Yuefeng, Huang,Maosong, Cheng,Zhimin, Dai.(2023).Pulse-shaping method for real-time neutron/gamma discrimination at low sampling rates.中国科学院科技论文预发布平台.doi:10.12074/202309.00112V1 (点此复制)