Alkali metal chalcogenides for radiation detection

J. A. Peters, Zhifu Liu, B. W. Wessels, I. Androulakis, C. P. Sebastian, Hao Li, M. G. Kanatzidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We report on the optical and charge transport properties of novel alkali metal chalcogenides, Cs 2Hg 6S 7 and Cs 2Cd 3Te 4, pertaining to their use in radiation detection. Optical absorption, photoconductivity, and gamma ray response measurements for undoped crystals were measured. The band gap energies of the Cs 2Hg 6S 7 and Cs 2Cd 3Te 4 compounds are 1.63 eV and 2.45 eV, respectively. The mobility-lifetime products for charge carriers are of the order of ∼10 -3 cm 2/V for electrons and ∼10 -4 cm 2/V for holes. Detectors fabricated from the ternary compound Cs 2Hg 6S 7 shows well-resolved spectroscopic features at room temperature in response to γ-rays at 122 keV from a 57Co source, indicating its potential as a radiation detector.

Original languageEnglish
Title of host publicationNuclear Radiation Detection Materials - 2011
Pages133-138
Number of pages6
DOIs
Publication statusPublished - Feb 20 2012
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 25 2011Apr 29 2011

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1341
ISSN (Print)0272-9172

Other

Other2011 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/25/114/29/11

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Peters, J. A., Liu, Z., Wessels, B. W., Androulakis, I., Sebastian, C. P., Li, H., & Kanatzidis, M. G. (2012). Alkali metal chalcogenides for radiation detection. In Nuclear Radiation Detection Materials - 2011 (pp. 133-138). (Materials Research Society Symposium Proceedings; Vol. 1341). https://doi.org/10.1557/opl.2011.1482