GEANT4 simulation of the characteristic gamma-ray spectrum of TNT under soil induced by DT neutrons

Xue QIN; Rong ZHOU; Ji-Feng HAN; Chao-Wen YANG

doi:10.13538/j.1001-8042/nst.26.010501

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GEANT4 simulation of the characteristic gamma-ray spectrum of TNT under soil induced by DT neutrons

NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH | Updated：2021-01-20

- GEANT4 simulation of the characteristic gamma-ray spectrum of TNT under soil induced by DT neutrons
- Nuclear Science and Techniques Vol. 26, Issue 1, Article number: 010501(2015)
- Affiliations：
  
  1.College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
  2.Key Laboratory of Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064, China
- Author bio：
  
  Corresponding author, zhourong@scu.edu.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.26.010501
  CLC：
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Xue QIN, Rong ZHOU, Ji-Feng HAN, et al. GEANT4 simulation of the characteristic gamma-ray spectrum of TNT under soil induced by DT neutrons. [J]. Nuclear Science and Techniques 26(1):010501(2015)
DOI：

Xue QIN, Rong ZHOU, Ji-Feng HAN, et al. GEANT4 simulation of the characteristic gamma-ray spectrum of TNT under soil induced by DT neutrons. [J]. Nuclear Science and Techniques 26(1):010501(2015) DOI： 10.13538/j.1001-8042/nst.26.010501.

摘要

Abstract

The characteristic gamma-ray spectrum of TNT in the soil induced by DT neutrons is measured by the PFTNA demining system. The GEANT4 toolkit is used to simulate the whole experimental procedure. The simulated spectra are compared with the experimental spectra, and they are mainly consistent. The share of the background sources such as neutrons and gamma is obtained and the contribution that the experimental apparatus to the background, such as shielding, detector sleeve and moderator, is analyzed. The effective gamma signal (from soil and TNT) is 29% of the full spectrum signal, and the background signal, more than 68%, this is mainly produced by shielding and the detector sleeve. By gradually optimizing the shielding and the cadmium sheet of the detector sleeve, the share of the effective gamma signal increases to 47%, and the background signal reduces to 18%.

关键词

Keywords

GEANT4Neutron inducedCharacteristic gamma-ray spectrumBackground contribution

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Related Institution

Hefei Institutes of Physical Science, Chinese Academy of Sciences

University of Science and Technology of China

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Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics

College of Physics, Sichuan University

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