Performance of large-area avalanche photodiode for low-energy X-rays and &gamma;-rays scintillation detection

Ikagawa, T.; Kataoka, J.; Yatsu, Y.; Kawai, N.; Mori, K.; Kamae, T.; Tajima, H.; Mizuno, T.; Fukazawa, Y.; Ishikawa, Y.; Kawabata, N.; Inutsuka, T. .

論文・著書情報

タイトル

和文:
英文:	Performance of large-area avalanche photodiode for low-energy X-rays and γ-rays scintillation detection

著者

和文:	Ikagawa, T., 片岡淳, Yatsu, Y., 河合誠之, Mori, K., Kamae, T., Tajima, H., Mizuno, T., Fukazawa, Y., Ishikawa, Y., Kawabata, N., Inutsuka, T. ..
英文:	Ikagawa, T., Kataoka, J., Yatsu, Y., Kawai, N., Mori, K., Kamae, T., Tajima, H., Mizuno, T., Fukazawa, Y., Ishikawa, Y., Kawabata, N., Inutsuka, T. ..

言語

English

掲載誌/書名

和文:
英文:	Nuclear Instruments and Methods in Physics Research A

巻, 号, ページ

Vol. 515 pp. 671-679

出版年月

2003年12月

出版者

和文:
英文:

会議名称

和文:
英文:

開催地

和文:
英文:

アブストラクト

We report on the performance of large-area (5×5mm²) 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 300-350V. The leakage current is 1.2nA at room temperature (25°C) and decreases to 10pA 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 59.5keV γ-rays from ²⁴¹Am and 122keV γ-rays from ⁵⁷Co sources, respectively, as measured with a 5×5×5mm³ cubic CsI(Tl) crystal. We show that the minimum detectable energy for the scintillation light is remarkably low; 4.6keV at room temperature (20°C) and 1.1keV at -20°C. 5.9keV 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.

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