TY - JOUR
T1 - Performance of large-area avalanche photodiode for low-energy X-rays and γ-rays scintillation detection
AU - Ikagawa, T.
AU - Kataoka, J.
AU - Yatsu, Y.
AU - Kawai, N.
AU - Mori, K.
AU - Kamae, T.
AU - Tajima, H.
AU - Mizuno, T.
AU - Fukazawa, Y.
AU - Ishikawa, Y.
AU - Kawabata, N.
AU - Inutsuka, T.
PY - 2003/12/11
Y1 - 2003/12/11
N2 - We report on the performance of large-area (5×5 mm2) avalanche photodiodes (APD) produced by Hamamatsu Photonics, as a low-energy X-rays and γ-rays scintillation detector. Hamamatsu APD has a reverse structure and works at relatively low bias voltage of 300-350 V. The leakage current is 1.2 nA at room temperature (25°C) and decreases to 10 pA at -20°C for an avalanche gain of 50. The best FWHM energy resolutions of 9.4±0.3% and 7.4±0.3% were obtained for 59.5 keV γ-rays from 241Am and 122 keV γ-rays from 57Co sources, respectively, as measured with a 5×5×5 mm3 cubic CsI(Tl) crystal. We show that the minimum detectable energy for the scintillation light is remarkably low; 4.6 keV at room temperature (20°C) and 1.1 keV at -20°C. 5.9 keV X-rays from 55Fe were clearly resolved at -20°C with an FWHM resolution of 32.9±0.3%. These results suggest that Hamamatsu APD can be a promising device for future applications in low-energy scintillation detection.
AB - We report on the performance of large-area (5×5 mm2) avalanche photodiodes (APD) produced by Hamamatsu Photonics, as a low-energy X-rays and γ-rays scintillation detector. Hamamatsu APD has a reverse structure and works at relatively low bias voltage of 300-350 V. The leakage current is 1.2 nA at room temperature (25°C) and decreases to 10 pA at -20°C for an avalanche gain of 50. The best FWHM energy resolutions of 9.4±0.3% and 7.4±0.3% were obtained for 59.5 keV γ-rays from 241Am and 122 keV γ-rays from 57Co sources, respectively, as measured with a 5×5×5 mm3 cubic CsI(Tl) crystal. We show that the minimum detectable energy for the scintillation light is remarkably low; 4.6 keV at room temperature (20°C) and 1.1 keV at -20°C. 5.9 keV X-rays from 55Fe were clearly resolved at -20°C with an FWHM resolution of 32.9±0.3%. These results suggest that Hamamatsu APD can be a promising device for future applications in low-energy scintillation detection.
KW - Avalanche photodiode
KW - Low-signal scintillation detector
KW - Minimum detectable energy
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U2 - 10.1016/j.nima.2003.07.024
DO - 10.1016/j.nima.2003.07.024
M3 - Article
AN - SCOPUS:0242438782
SN - 0168-9002
VL - 515
SP - 671
EP - 679
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
IS - 3
ER -