Radiation damage effects by 25MeV protons and thermal annealing effects on thallium bromide nuclear radiation detectors

Keitaro Hitomi, T. Shoji, T. Suehiro, Y. Hiratate

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

In this study, TIBr detectors were irradiated with 25MeV protons accelerated by an AVF cyclotron. Isothermal annealing was performed to restore the performance of the detectors. In order to characterize the radiation damage and thermal annealing effects on the TIBr detectors, we measured current-voltage (I-V) characteristics, mobility-lifetime (μτ) products and spectrometric responses. The I-V and μτ measurements suggest that electron traps have been induced by 25MeV protons in the TlBr crystals. X- and γ-ray energy spectra were measured for two different electronic conditions: the electric signals induced mainly by electron carriers traversing the crystal were used for one case and the signal induced by hole carriers were used in the other case. After irradiation of 25MeV protons, the 241Am X- and γ-ray spectra obtained in the former showed significantly degraded energy resolution. No degradation of energy resolution, however, was observed in the latter case. Noticeable improvements of the degraded detector performance have been observed after the thermal annealing.

Original languageEnglish
Pages (from-to)213-217
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume46
Issue number3 PART 1
DOIs
Publication statusPublished - 1999 Dec 1

ASJC Scopus subject areas

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

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