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Geant4 analysis and optimization of a double crystal phoswich detector for beta–gamma coincidence detection

  • Xing Fan
  • Xian-Peng Zhang
  • Geng Tian
  • Chao-Wen Yang
Article
  • 79 Downloads

Abstract

In this study, a novel phoswich detector for beta–gamma coincidence detection is designed. Unlike the triple crystal phoswich detector designed by researchers at the University of Missouri, Columbia, this phoswich detector is of the semi-well type, so it has a higher detection efficiency. The detector consists of BC-400 and NaI:Tl with decay time constants of 2.4 and 230 ns, respectively. The BC-400 scintillator detects beta particles, and the NaI:Tl cell is used for gamma detection. Geant4 simulations of this phoswich detector find that a 2-mm-thick BC-400 scintillator can absorb nearly all of the beta particles whose energies are below 700 keV. Further, for a 2.00-cm-thick NaI:Tl crystal, the gamma source peak efficiency for photons ranges from a maximum of nearly 90% at 30 keV to 10% at 1 MeV. The self-absorption effect is also discussed in this paper in order to determine the carrier gas’s influence.

Keywords

Geant4 Phoswich detector Beta–gamma coincidence detection Detection efficiency 

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Copyright information

© Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Chinese Nuclear Society, Science Press China and Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xing Fan
    • 1
    • 2
  • Xian-Peng Zhang
    • 3
  • Geng Tian
    • 3
  • Chao-Wen Yang
    • 1
    • 2
  1. 1.Department of Nuclear Engineering and Technology, College of Physics Science and TechnologySichuan UniversityChengduChina
  2. 2.Key Laboratory of Radiation Physics and Technology, Ministry of EducationSichuan UniversityChengduChina
  3. 3.Northwest Institute of Nuclear TechnologyXi’anChina

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