TY - JOUR
T1 - BiI3 single crystal for room-temperature gamma ray detectors
AU - Saito, T.
AU - Iwasaki, T.
AU - Kurosawa, S.
AU - Yoshikawa, A.
AU - Den, T.
PY - 2016/1/11
Y1 - 2016/1/11
N2 - BiI3 single crystals were grown by the physical vapor transport method. The repeated sublimation of the starting material reduced impurities in the BiI3 single crystal to sub-ppm levels. The detector was fabricated by depositing Au electrodes on both surfaces of the 100-μm-thick BiI3 single crystal platelet. The resistivity of the BiI3 single crystal was increased by post-annealing in an iodine atmosphere (ρ=1.6×1011 Ω cm). Pulse height spectroscopy measurements showed clear peaks in the energy spectrum of alpha particles or gamma rays. It was estimated that the mobility-lifetime product was μeτe=3.4-8.5×10-6 cm2/V and the electron-hole pair creation energy was 5.8 eV. Our results show that BiI3 single crystals are promising candidates for detectors used in radiographic imaging or gamma ray spectroscopy.
AB - BiI3 single crystals were grown by the physical vapor transport method. The repeated sublimation of the starting material reduced impurities in the BiI3 single crystal to sub-ppm levels. The detector was fabricated by depositing Au electrodes on both surfaces of the 100-μm-thick BiI3 single crystal platelet. The resistivity of the BiI3 single crystal was increased by post-annealing in an iodine atmosphere (ρ=1.6×1011 Ω cm). Pulse height spectroscopy measurements showed clear peaks in the energy spectrum of alpha particles or gamma rays. It was estimated that the mobility-lifetime product was μeτe=3.4-8.5×10-6 cm2/V and the electron-hole pair creation energy was 5.8 eV. Our results show that BiI3 single crystals are promising candidates for detectors used in radiographic imaging or gamma ray spectroscopy.
KW - BiI
KW - Detector
KW - Gamma ray
KW - Semiconductor
KW - Single crystal
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U2 - 10.1016/j.nima.2015.10.036
DO - 10.1016/j.nima.2015.10.036
M3 - Article
AN - SCOPUS:84945918577
VL - 806
SP - 395
EP - 400
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
SN - 0168-9002
ER -