[22p-F307-1~11] 2.2 Radiation physics fundamentals & applications, radiation generators, new technology

△ [22p-F307-3] Evaluation of Conversion Electron Counts for the Self-activation Method using a CsI Scintillator

〇Riku Matsumura¹, Genichiro Wakabayashi¹, Akihiro Nohtomi², Nayuta Nagatomo¹, Masakazu Horiuchi¹ (1.Kindai Univ., 2.Kyushu Univ.)

Keywords:CsI scintillator, thermal neutron

In the neutron flux measurement method using self-activation of a CsI scintillator, thermal neutron fluxes are measured by counting 128 keV conversion electrons from ^134mCs produced in the scintillator. However, ^134mCs also emits 128 keV γ-rays, which are counted as the same 128 keV peak as conversion electrons when photoelectric effect occurs. In this study, we calculate the ratio of γ-rays emitted by ^134mCs which were counted as the 128 keV peak by the photoelectric effect.