Thermal Neutron Flux Measurement by Counting Conversion Electrons from 134mCs Generated in a CsI Scintillator

Miyu Shimazu, Genichiro Wakabayashi, Akihiro Nohtomi, Yusuke Koba, Kiyomitsu Shinsho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new method to measure low intensity neutrons such as secondary neutrons generated in radiotherapy has been developed. In the proposed method, thermal neutron flux is determined by measuring the conversion electrons from 134mCs generated in a CsI(Tl) scintillator irradiated by neutrons. Because the generated 134mCs is contained in the scintillator as internal sources, the emitted conversion electrons fully stop in the scintillator and counted with high efficiency. The thermal neutron flux in the neutron radiography facility of the Kindai University's research reactor, UTR-KINKI, was measured by the proposed method. The cadmium difference method was used to separate the contributions of thermal and epi-thermal neutrons. The result was in good agreement with the one obtained by the conventional gold foil activation method. It was concluded that the proposed method is useful for the measurement of thermal neutron flux.

Original languageEnglish
Title of host publication2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538684948
DOIs
Publication statusPublished - Nov 2018
Event2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Sydney, Australia
Duration: Nov 10 2018Nov 17 2018

Publication series

Name2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings

Conference

Conference2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018
CountryAustralia
CitySydney
Period11/10/1811/17/18

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics

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    Shimazu, M., Wakabayashi, G., Nohtomi, A., Koba, Y., & Shinsho, K. (2018). Thermal Neutron Flux Measurement by Counting Conversion Electrons from 134mCs Generated in a CsI Scintillator. In 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings [8824515] (2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2018.8824515