Fabrication of double-sided thallium bromide strip detectors

Keitaro Hitomi, Nobumichi Nagano, Toshiyuki Onodera, Seong Yun Kim, Tatsuya Ito, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

Abstract

Double-sided strip detectors were fabricated from thallium bromide (TlBr) crystals grown by the traveling-molten zone method using zone-purified materials. The detectors had three 3.4-mm-long strips with 1-mm widths and a surrounding electrode placed orthogonally on opposite surfaces of the crystals at approximately 6.5×6.5 mm2 in area and 5 mm in thickness. Excellent charge transport properties for both electrons and holes were observed from the TlBr crystals. The mobility-lifetime products for electrons and holes in the detector were measured to be ∼3×10-3 cm2/V and ∼1×10-3 cm2/V, respectively. The 137Cs spectra corresponding to the gamma-ray interaction position were obtained from the detector. An energy resolution of 3.4% of full width at half maximum for 662-keV gamma rays was obtained from one "pixel" (an intersection of the strips) of the detector at room temperature.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume823
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • Gamma-ray detector
  • Position-sensitive detector
  • Semiconductor radiation detector
  • Strip detector
  • Thallium bromide (TlBr)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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