TY - JOUR
T1 - Geometry dependence of the light collection efficiency of BGO crystal scintillators read out by avalanche photo diodes
AU - Sasano, M.
AU - Nishioka, H.
AU - Okuyama, S.
AU - Nakazawa, K.
AU - Makishima, K.
AU - Yamada, S.
AU - Yuasa, T.
AU - Okumura, A.
AU - Kataoka, J.
AU - Fukazawa, Y.
AU - Hanabata, Y.
AU - Hayashi, K.
PY - 2013
Y1 - 2013
N2 - Abstract Light collection efficiency from BGO crystal scintillators of various sizes and shapes was measured by reading them using 1×1 cm 2 avalanche photo diodes. When the crystals have simple geometry, the light collection efficiency was found to depend on their size, shape and the read-out position through a rather well-defined empirical scaling relation. The light collection efficiency of tapered crystals was seen to depend on both the position of γ-ray irradiation, and the read-out position of the avalanche photo diodes. Using optical Monte-Carlo simulations, the relation was reproduced assuming plausible proper parameters for surface conditions and the attenuation length. This results were reproduced with a reasonable accuracy by optical Monte-Carlo simulations. Simple physical explanations are given to these geometrical effects.
AB - Abstract Light collection efficiency from BGO crystal scintillators of various sizes and shapes was measured by reading them using 1×1 cm 2 avalanche photo diodes. When the crystals have simple geometry, the light collection efficiency was found to depend on their size, shape and the read-out position through a rather well-defined empirical scaling relation. The light collection efficiency of tapered crystals was seen to depend on both the position of γ-ray irradiation, and the read-out position of the avalanche photo diodes. Using optical Monte-Carlo simulations, the relation was reproduced assuming plausible proper parameters for surface conditions and the attenuation length. This results were reproduced with a reasonable accuracy by optical Monte-Carlo simulations. Simple physical explanations are given to these geometrical effects.
KW - Keywords Scintillator BGO Avalanche photodiode
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U2 - 10.1016/j.nima.2013.03.022
DO - 10.1016/j.nima.2013.03.022
M3 - Article
AN - SCOPUS:84876371281
SN - 0168-9002
VL - 715
SP - 105
EP - 111
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -