Studies of gamma radiation induced effects in ge-rich chalcogenide thin films

Diana Nesheva, Mahesh Ailavajhala, Ping Chen, Dmitri A. Tenne, Hugh Barnaby, Maria Mitkova

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

1 Scopus citations

Abstract

Ge40Se60 thin films (100 nm thick) were gamma-irradiated in a 60Co (Eav = 1.25 MeV) radioisotope capsule at a dose rate of 12 rad/sec and applied γ-ray doses ranging from 20 krad(Si) to 3 Mrad(Si). The effect of-radiation over the structure is well evidenced on the Raman spectra of the films; there is a change in the relative intensity of the Raman bands which suggests a disorder increase for the low doses (< 200 krad) and some structural ordering for the higher doses. The relative ratio of the edge-sharing/corner-sharing structural units increases which implies some opening of the structure after radiation. A significant increase of the photoconductivity-to-dark conductivity ratio upon irradiation has been observed which confirms the conclusion for the γ-induced ordering. These effects are expected to be used in a radiation sensor in which both-the radiation induced changes in the materials' structure and Ag diffusion are applied.

Original languageEnglish (US)
Title of host publicationRAD 2012 - 1st International Conference on Radiation and Dosimetry in Various Fields of Research, Proceedings
EditorsGoran Ristic
PublisherRAD Association
Pages19-22
Number of pages4
ISBN (Electronic)9788661250637
StatePublished - 2012
Event1st International Conference on Radiation and Dosimetry in Various Fields of Research, RAD 2012 - Nis, Serbia
Duration: Apr 25 2012Apr 27 2012

Publication series

NameRAD Conference Proceedings
Volume2012-April
ISSN (Electronic)2466-4626

Other

Other1st International Conference on Radiation and Dosimetry in Various Fields of Research, RAD 2012
CountrySerbia
CityNis
Period4/25/124/27/12

Keywords

  • Dark and photoconductivity
  • Ge-Se thin films
  • Structural changes
  • γ-irradiation

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Nuclear and High Energy Physics
  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Safety, Risk, Reliability and Quality

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