Thallium bromide optical and radiation detectors for X-ray and gamma-ray spectroscopy

Keitaro Hitomi, Manabu Matsumoto, Osamu Muroi, Tadayoshi Shoji, Yukio Hiratate

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43 Citations (Scopus)


A compound semiconductor, thallium bromide (TlBr), has been investigated as an optical and radiation detector material for use in X- and γ-ray spectroscopy. Single crystals of TlBr have been grown by the traveling molten zone method using zone-purified materials. X- and γ-ray detectors have been fabricated from the TlBr crystals. The TlBr detectors have exhibited good spectrometric performances at room temperature. Polarization in TlBr detectors has been observed to deteriorate detector performance. Optical detectors for scintillation spectroscopy have been fabricated from the crystals by depositing optically transparent electrodes of indium-tin-oxide (ITO) on the front surfaces of the crystals. The quantum efficiency of the TlBr optical detectors is high in the wavelength region below ∼460 nm, where the scintillation emissions of LSO and GSO occur.

Original languageEnglish
Pages (from-to)2526-2529
Number of pages4
JournalIEEE Transactions on Nuclear Science
Volume49 II
Issue number5
Publication statusPublished - 2002 Oct


  • Optical detector
  • Semiconductor detector
  • Thallium bromide (TIBr)


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