Neutron background measurements at China Jinping underground laboratory with a Bonner Multi-sphere Spectrometer

Qingdong Hu; Hao Ma; Zhi Zeng; Jianping Cheng; Yunhua Chen; Shenming He; Junli Li; Manbin Shen; Shiyong Wu; Qian Yue; Jianfeng Yue; Hui Zhang

doi:10.1016/j.nima.2017.03.048

Neutron background measurements at China Jinping underground laboratory with a Bonner Multi-sphere Spectrometer

Instrumentation and Detectors 2017-04-26 v1 High Energy Physics - Experiment Nuclear Experiment

Authors: Qingdong Hu , Hao Ma , Zhi Zeng , Jianping Cheng , Yunhua Chen , Shenming He , Junli Li , Manbin Shen , Shiyong Wu , Qian Yue , Jianfeng Yue , Hui Zhang

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Abstract

The neutron background spectrum from thermal neutron to 20 MeV fast neutron was measured at the first experimental hall of China Jinping underground laboratory with a Bonner multi-sphere spectrometer. The measurement system was validated by a Cf252 source and inconformity was corrected. Due to micro charge discharge, the dataset was screened and background from the steel of the detectors was estimated by MC simulation. Based on genetic algorithm we obtained the energy distribution of the neutron and the total flux of neutron was (2.69 +/-1.02) *10^-5 cm^-2s^-1

Keywords

neutron background Bonner sphere spectrometer underground laboratory neutron flux genetic algorithm

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@article{arxiv.1612.04054,
  title  = {Neutron background measurements at China Jinping underground laboratory with a Bonner Multi-sphere Spectrometer},
  author = {Qingdong Hu and Hao Ma and Zhi Zeng and Jianping Cheng and Yunhua Chen and Shenming He and Junli Li and Manbin Shen and Shiyong Wu and Qian Yue and Jianfeng Yue and Hui Zhang},
  journal= {arXiv preprint arXiv:1612.04054},
  year   = {2017}
}

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Neutron background measurements at China Jinping underground laboratory with a Bonner Multi-sphere Spectrometer

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