Recent development of TlBr gamma-ray detectors

Keitaro Hitomi, Tsutomu Tada, Seong Yun Kim, Yan Wu, Tomonobu Tanaka, Tadayoshi Shoji, Hiromichi Yamazaki, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Planar detectors, strip detectors, and double-sided strip detectors were fabricated from TlBr crystals grown by the traveling molten zone method using zone-purified material. The detector performance including the leakage current, energy resolutions, and timing performance were evaluated in order to assess the capability of the detectors for PET and SPECT applications. The TlBr detectors exhibited excellent spectroscopic performance at room temperature. An energy resolution of 3.4% FWHM at 511 keV was obtained from a TlBr planar detector 1 mm thick. A TlBr strip detector 1 mm thick with four anode strip electrodes exhibited almost uniform detector performance over the strips with the average energy resolution of 4.4% FWHM at 511 keV. A TlBr double-sided strip detector exhibited an energy resolution of 6.3% FWHM for 122 keV gamma-rays. Coincidence timing spectra between a TlBr planar detector and a BaF 2 scintillation detector were recorded at room temperature. Timing resolutions of 14 ns and 24 ns were obtained from TlBr detectors 0.5 mm and 1 mm thick, respectively. By cooling the detector to 0° C, an improved timing resolution of 12 ns was obtained from a TlBr detector 1 mm thick.

Original languageEnglish
Article number5735203
Pages (from-to)1987-1991
Number of pages5
JournalIEEE Transactions on Nuclear Science
Issue number4 PART 2
Publication statusPublished - 2011 Aug


  • Gamma ray detectors
  • position-sensitive detectors
  • positron emission tomography
  • semiconductor radiation detectors
  • single photon emission computed tomography
  • thallium bromide

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


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