Effect of detector crystal size on Compton suppression factors


Kaya S., Çelik N., Gök A., ÇEVİK U.

Radiation Effects and Defects in Solids, vol.178, no.11-12, pp.1449-1462, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 178 Issue: 11-12
  • Publication Date: 2023
  • Doi Number: 10.1080/10420150.2023.2258432
  • Journal Name: Radiation Effects and Defects in Solids
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.1449-1462
  • Keywords: Compton suppression factor, EGS4 code, HPGe detector
  • Karadeniz Technical University Affiliated: Yes

Abstract

The geometrical parameters which affect the suppression factor for an HPGe (High Purity Germanium)-NaI Compton suppression spectrometer were studied by a Monte Carlo simulation with the EGS4 system. The spectrums were crated for 5 energy values ranging from 200 keV to 2 MeV. Compton suppression factors (CSFs), the parameters characterizing the system performance, were calculated for different HPGe crystal parameters. It was observed that to obtain better Compton suppressed factors, a laboratory must choose as small HPGe crystal as possible for energy values up to 400 keV. However, for higher energies up to 2 MeV, larger HPGe crystals provide better Compton suppression systems. These findings suggest that the choice of HPGe crystal size can significantly impact the performance of a Compton suppression spectrometer and should be carefully considered in its design and optimization.