Characterization of pixelated TlBr detectors with Tl electrodes

Keitaro Hitomi, Toshiyuki Onodera, Seong Yun Kim, Tadayoshi Shoji, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


A 4.36-mm-thick pixelated thallium bromide (TlBr) detector with Tl electrodes was fabricated from a crystal grown by the traveling molten zone method using zone-purified material. The detector had four 1×1 mm 2 pixelated anodes. The detector performance was characterized at room temperature. The mobility-lifetime products of electrons for each pixel of the TlBr detector were measured to be >2.8×10-3 cm 2/V. The four pixelated anodes of the detector exhibited energy resolutions of 1.5-1.8% full width at half maximum (FWHM) for 662-keV gamma rays for single-pixel events with the depth correction method. An energy resolution of 4.5% FWHM for 662-keV gamma rays was obtained from a reconstructed energy spectrum using two-pixel events from the two pixelated anodes on the detector.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2014 May 21


  • Gamma-ray detector
  • Pixelated detector
  • Position-sensitive detector
  • Semiconductor radiation detector
  • Thallium bromide


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