Counting Efficiency of Registration of Contributions of Fast Neutron Reaction Products by Detectors Based on Oxide Scintillators ZnWO4, Bi4Ge3O12, CdWO4 and Gd2SiO5

  • Gennadiy M. Onyshchenko V.N. Karazin Kharkiv National University, Kharkiv, Ukraine; Institute of Scintillation Materials, STC "Institute of Single Crystals" National Academy of Sciences of Ukraine, Kharkiv, Ukraine https://orcid.org/0000-0001-6945-8413
  • Boris V. Grynyov Institute of Scintillation Materials, STC "Institute of Single Crystals" National Academy of Sciences of Ukraine, Kharkiv, Ukraine https://orcid.org/0000-0003-1700-0173
  • Ivan I. Yakymenko V.N. Karazin Kharkiv National University, Kharkiv, Ukraine https://orcid.org/0000-0002-0194-8376
  • Sergey V. Naydenov Institute of Single Crystals, STC "Institute of Single Crystals", National Academy of Sciences of Ukraine, Kharkiv, Ukraine https://orcid.org/0000-0002-5585-763X
  • Pylyp E. Kuznietsov V.N. Karazin Kharkiv National University, O.I. Akhiezer Department for Nuclear and High Energy Physics, Kharkiv, Ukraine https://orcid.org/0000-0001-8477-1395
  • Oleksandr Shchus V.N. Karazin Kharkiv National University, Kharkiv, Ukraine https://orcid.org/0000-0001-6063-197X
DOI: https://doi.org/10.26565/2312-4334-2023-4-46
Keywords: Oxide scintillator, ZWO, BGO, CWO, GSO, Fast neutrons, 239Pu-Be, Resonance capture, Counting efficiency, Density of nuclear levels, Single photoelectron mode

Abstract

The results of the study of the contributions of the interaction reactions of fast neutron sources of 239Pu-Be and 252Cf to the counting efficiency of registration by oxide scintillators CdWO4, ZnWO4, Bi4Ge3O12 and Gd2SiO5, presented. The amount of gamma quanta per input neutron emitted from final nuclei excited in the reactions of inelastic scattering (n, nʹγ)in, resonant scattering (n, n)res and capture (n, γ)res and radiation capture (n, γ)cap was measured. PMT R1307 operating in single-electron mode was used as a photodetector, the background rate was ~ 5*103 s-1. The measured efficiency ε for scintillators ø40x40 mm was 752 for ZWO, 532 for CWO, 37 for GSO, and 23 for BGO in "counts/neutron" units, measurement error rate ~ 3-5%. The formation of the detector response is influenced by the parameters of the scintillator nuclei, such as the values of the interaction cross sections in the resonance region, the density of nuclear levels of the final nuclei, the lifetime of excited nuclear states, the upper limit of the resonance region of the cross section, as well as the scintillation time and geometric parameters of the scintillators. A phenomenological model of the response of an oxide scintillator to fast neutrons is proposed.

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Published
2023-12-02
Cited
How to Cite
Onyshchenko, G. M., Grynyov, B. V., Yakymenko, I. I., Naydenov, S. V., Kuznietsov, P. E., & Shchus, O. (2023). Counting Efficiency of Registration of Contributions of Fast Neutron Reaction Products by Detectors Based on Oxide Scintillators ZnWO4, Bi4Ge3O12, CdWO4 and Gd2SiO5. East European Journal of Physics, (4), 355-370. https://doi.org/10.26565/2312-4334-2023-4-46
Issue
No. 4 (2023): East European Journal of Physics
Section
Original Papers

Copyright (c) 2023 Gennadiy Onyshchenko, Borys Grynyov, Ivan Yakymenko, Sergei Naydenov, Pylyp Kuznietsov, Oleksandr Shchus

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