Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (8): 80401-080401.doi: 10.11889/j.0253-3219.2020.hjs.43.080401

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Research on optimal design of new neutron detector based on 6Li + CdTe

Long MA1,Lichao TIAN1,Yanyun MA1,2(),Zhongliang LYU1,Peng HAN1,Meng PENG1,Xiaohu YANG1,Guobo ZHANG1,Xiaoxiao LI1,Fei SHAN1   

  1. 1.College of Art and Science, National University of Defense Technology, Changsha 410073, China
    2.IFSA Collaborative Innovation Center, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2020-02-18 Revised:2020-06-10 Online:2020-08-15 Published:2020-08-12
  • Contact: Yanyun MA E-mail:yanyunma@126.com
  • About author:MA Long, male, born in 1996, graduated from National University of Defense Technology in 2014, master student, focusing on nuclear radiation detection technology
  • Supported by:
    National Natural Science Foundation of China(11505287)

Abstract: Background

Facing the internationally serious shortage of 3He gas, a novel neutron detector based on 6Li+CdTe was proposed in 2018, which has high neutron detection efficiency and low γ sensitivity, showing a good application prospect.

Purpose

This study aims to conduct an optimal design of the neutron detector based on 6Li+CdTe and explore its application to the special nuclear material monitoring system.

Methods

First, the structure and operating principle of a typical 6Li+CdTe unit was analyzed. Then the Monte Carlo simulation of MCNP6 was employed to optimize the key parameters of this detector. Finally, integrated analysis was performed using this model for the special nuclear material monitoring system.

Results

The optimal thickness of the CdTe absorption layer is 10 μm. When the number of 6Li+CdTe detection units reaches 6 layers with the optimal 6Li layer of 60 μm, the detection efficiency is more than 50%. A detector system with an area of 4 m×32 cm, surrounded by polyethylene of 3 cm in the front and 10 cm in the side and back, can meet the requirements of the special nuclear material monitoring system.

Conclusions

The novel neutron detector with optimal design can be used as the alternative of 3He based neutron detector in the special nuclear material monitoring system.

Key words: Neutron detection, Semiconductor detector, 6Li, MCNP simulation

CLC Number: 

  • TL816+.3