Large-volume thallium bromide detectors for gamma-ray spectroscopy

K. Hitomi, O. Muroi, M. Matsumoto, T. Shoji, Y. Hiratate

研究成果: Conference article査読

11 被引用数 (Scopus)


Thallium bromide (TlBr) is a wide-bandgap compound semiconductor characterized with high photon stopping power. In this study, large-volume γ-ray detectors (approximately 3.8 × 3.8 × 3.8 mm3) have been fabricated from TlBr crystals grown by the horizontal travelling molten zone (TMZ) method using zone-purified material. In order to extract the energy information of the incident radiation from the thick detectors, the short charge-collection time technique has been applied to the detectors. By this technique, the induced charge on the electrode is measured for a period of time that is short compared to the carrier transit time in order to minimize the deviation of the measured induced charge. The large-volume TlBr detectors irradiated with 22Na and 137Cs γ-ray sources at room temperature have exhibited energy resolutions of 18.7% and 17.4% (FWHM) for the 511- and 662-keV peaks, respectively. To our knowledge, this is the first time that full-energy peaks have been obtained from TlBr detectors several millimeters thick. The time stability of the detector operation is also studied.

ジャーナルIEEE Transactions on Nuclear Science
6 II
出版ステータスPublished - 2001 12月
イベント2001 Nuclear Science Symposium (NSS) - Lyon, France
継続期間: 2000 10月 152000 10月 20

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 電子工学および電気工学


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