Reverse-type avalanche photodiode for scintillation detection and intrinsic energy resolution of BGO and GSO:Ce

Mitsuhiro Sato, Takayuki Yanagida, Akira Yoshikawa, Yousuke Yatsu, Jun Kataoka, Yoshitaka Ishikawa, Fumio Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

In this paper we present a summary of a study of reverse-type avalanche photodiodes (APDs) used as scintillation detectors for X- and γ-ray spectroscopy. The energy resolution of the APDs was evaluated by varying the avalanche gain, M, in the range from 1 to 200. The best energy resolution recorded for the 662 keV 137Cs γ-ray photoabsorption peak was 8.3 ± 0.5 % using a 5 × 5 × 5 mm3 BGO crystal coupled to a S8664-55 APD with a 5 × 5 mm2 light sensitive window, manufactured by Hamamatsu Photonics, Inc. The measurement was made with a gain of 20 and at a temperature of -20 °C. The main advantage of this method is that an accurate value for the intrinsic resolution of the crystal can be easily obtained by subtracting the contribution to the energy resolution from circuit noise and the electron-hole pair statistics. The intrinsic energy resolution of the BGO crystal sample at 662 keV was found to be 6.5 ± 0.5%. The observed intrinsic energy resolution of BGO as a function of energy shows the same relationship as that shown in other published works. With this method the intrinsic energy resolution of GSO (Ce 0.5 % mol) was also measured. While the intrinsic energy resolution of BGO shows an energy dependence proportional to E-1/2, GSO has a step-like characteristic, with the energy resolution increasing from ∼100 keV up to ∼500 keV.

Original languageEnglish
Title of host publication2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Pages2023-2032
Number of pages10
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
Duration: 2007 Oct 272007 Nov 3

Publication series

NameIEEE Nuclear Science Symposium Conference Record
Volume3
ISSN (Print)1095-7863

Conference

Conference2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
CountryUnited States
CityHonolulu, HI
Period07/10/2707/11/3

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ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

Cite this

Sato, M., Yanagida, T., Yoshikawa, A., Yatsu, Y., Kataoka, J., Ishikawa, Y., & Saito, F. (2007). Reverse-type avalanche photodiode for scintillation detection and intrinsic energy resolution of BGO and GSO:Ce. In 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC (pp. 2023-2032). [4436550] (IEEE Nuclear Science Symposium Conference Record; Vol. 3). https://doi.org/10.1109/NSSMIC.2007.4436550