A capture-gated fast neutron detection method

Get Citation
Yi Liu, Yi-Gang Yang, Yang Tai and Zhi Zhang. A capture-gated fast neutron detection method[J]. Chinese Physics C, 2016, 40(7): 076201. doi: 10.1088/1674-1137/40/7/076201
Yi Liu, Yi-Gang Yang, Yang Tai and Zhi Zhang. A capture-gated fast neutron detection method[J]. Chinese Physics C, 2016, 40(7): 076201.  doi: 10.1088/1674-1137/40/7/076201 shu
Milestone
Received: 2015-11-23
Fund

    Supported by National Natural Science Foundation of China (11175098, 11375095)

Article Metric

Article Views(1273)
PDF Downloads(242)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

A capture-gated fast neutron detection method

    Corresponding author: Yi-Gang Yang,
Fund Project:  Supported by National Natural Science Foundation of China (11175098, 11375095)

Abstract: To address the problem of the shortage of neutron detectors used in radiation portal monitors (RPMs), caused by the 3He supply crisis, research on a cadmium-based capture-gated fast neutron detector is presented in this paper. The detector is composed of many 1 cm×1 cm×20 cm plastic scintillator cuboids covered by 0.1 mm thick film of cadmium. The detector uses cadmium to absorb thermal neutrons and produce capture γ-rays to indicate the detection of neutrons, and uses plastic scintillator to moderate neutrons and register γ-rays. This design removes the volume competing relationship in traditional 3He counter-based fast neutron detectors, which hinders enhancement of the neutron detection efficiency. Detection efficiency of 21.66% ± 1.22% has been achieved with a 40.4 cm×40.4 cm×20 cm overall detector volume. This detector can measure both neutrons and γ-rays simultaneously. A small detector (20.2 cm×20.2 cm×20 cm) demonstrated a 3.3 % false alarm rate for a 252Cf source with a neutron yield of 1841 n/s from 50 cm away within 15 s measurement time. It also demonstrated a very low (<0.06%) false alarm rate for a 3.21×105 Bq 137Cs source. This detector offers a potential single-detector replacement for both neutron and the γ-ray detectors in RPM systems.

    HTML

Reference (18)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return