Measurements of Photon Mass Attenuation Coefficients for Ge and BGO Crystals at 10 MeV

The photon mass attenuation coefficients of the important materials for γ-ray detection, Ge and BGO (Bi4Ge3O12) crystals, have been measured for 10.0 MeV γ-rays. The measurement system using the laser-Compton backscattering γ-rays and the high-resolution high-energy photon spectrometer has been deve...

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Bibliographic Details
Published in:Journal of nuclear science and technology 2008-11, Vol.45 (11), p.1228-1232
Main Authors: Harada, Hideo, Kitatani, Fumito, Goko, Shinji, Hara, Kaoru Y, Toyokawa, Hiroyuki, Kaihori, Takeshi, Utsunomiya, Hiroaki
Format: Article
Language:English
Subjects:
Atomic properties
Attenuation coefficients
Backscattering
BGO (crystal)
Crystals
Germanium
Photons
Uncertainty
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Summary:The photon mass attenuation coefficients of the important materials for γ-ray detection, Ge and BGO (Bi4Ge3O12) crystals, have been measured for 10.0 MeV γ-rays. The measurement system using the laser-Compton backscattering γ-rays and the high-resolution high-energy photon spectrometer has been developed and utilized. The effectiveness of the system achieving the total systematic uncertainties of 0.5% for the measurements of the photon mass attenuation coefficients was demonstrated. It was shown that the measured photon mass attenuation coefficients, 318.1±1.7 [cm2/g] for the Ge crystal and 425.2±2.4 [cm2/g] for the BGO crystal, agree within the achieved experimental uncertainties with the evaluated values including atomic and nuclear processes at 10.0 MeV.
ISSN:0022-3131
1881-1248
DOI:10.3327/jnst.45.1228