Improvement of energy resolutions in TlBr detectors

Keitaro Hitomi, Yohei Kikuchi, Tadayoshi Shoji, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


Improvement of energy resolutions in thallium bromide (TlBr) detectors was achieved by using a gated integrator in the post amplifier stage. An energy resolution of 4.8% FWHM at 662 keV was obtained from a TlBr detector 1 mm thick at room temperature. The depth of interaction (DOI) in TlBr detectors for incident gamma-rays was determined by taking the Gaussian shaping amplifier signal to gated integrator signal ratio. The energy resolution of the detector was improved from 4.8% to 3.8% FWHM by implementation of the depth correction. The device exhibited an energy resolution of 3.3% FWHM at 662 keV by selecting gamma-ray interaction events in the detector. Long-term stability of a TlBr detector 0.36 mm thick with Tl electrode was also evaluated at room temperature. The detector operated stably for 600 h without significant performance degradations.

Original languageEnglish
Pages (from-to)112-115
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
Publication statusPublished - 2009 Aug 1


  • Gamma-ray spectrometers
  • Semiconductor detectors
  • Thallium bromide


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