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arXiv · 1703.10299

Measurements of the Total Cross section for Thermal Neutrons at PNS

Longxiang Liu·Hongwei Wang·Yugang Ma·Xiguang Cao·Xiangzhou Cai·Jingen Chen·Guilin Zhang·Jianlong Han·Guoqiang Zhang·Jifeng Hu·Xiaohe Wang·Wenjiang Li·Zhe Yan·Haijuan Fu
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Abstract

In order to measure the total cross section for thermal neutrons, a photoneutron source (PNS, phase 1) has been developed for the acquisition of nuclear data for the Thorium Molten Salt Reactor (TMSR) at the Shanghai Institute of Applied Physics (SINAP). PNS is an electron LINAC pulsed neutron facility that uses the time-of-flight (TOF) technique. It records the neutron TOF and identifies neutrons and $\gamma$-rays by using a digital signal processing technique. The background is obtained by using a combination of employing 12.8 cm boron-loaded polyethylene(PEB) (5$\%$ w.t.) to block the flight path and Monte Carlo methods. The neutron total cross sections of natural beryllium are measured in the neutron energy region from 0.007 to 0.1 eV. The present measurement result is compared with the fold Harvey data with the response function of PNS.

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Longxiang Liu, Hongwei Wang, Yugang Ma, Xiguang Cao, Xiangzhou Cai, Jingen Chen, Guilin Zhang, Jianlong Han, Guoqiang Zhang, Jifeng Hu, Xiaohe Wang, Wenjiang Li, Zhe Yan, Haijuan Fu. 2017-03-30. Measurements of the Total Cross section for Thermal Neutrons at PNS. https://arxiv.org/abs/1703.10299

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