Abstract

In this study we demonstrate the potential radiation sensing capabilities of a metal-chalcogenide glass (ChG) device. The lateral device senses radiation-induced migration of Ag+ ions in germanium selenide glasses by measuring changes in electrical resistance between electrodes. These devices exhibit a high-resistance 'OFF-state' (∼1012Ω) before irradiation, but following irradiation with either 60Co gamma-rays or UV light, their resistance drops to a low-resistance 'ON-state' (∼10 3Ω). The devices have exhibited cyclical recovery with room temperature annealing of Ag doped ChG, which suggests potential use in reusable radiation sensor applications. Furthermore, the mechanisms of radiation-induced Ag Ag+ transport and reactions in ChG are modeled using a finite element device simulator. The essential reactions captured by the simulator are radiation-induced carrier generation, combined with reduction/oxidation for both ionic and neutral Ag species in the chalcogenide film. The results provide strong qualitative evidence that finite element codes can simulate ionic transport reactions in the ChG and reveal plausible mechanisms for radiation-induced metal doping.

Original languageEnglish (US)
Article number6663709
Pages (from-to)4257-4264
Number of pages8
JournalIEEE Transactions on Nuclear Science
Volume60
Issue number6
DOIs
StatePublished - Dec 2013

Fingerprint

selenides
Germanium
germanium
Silver
silver
Radiation
Glass
glass
sensors
Sensors
radiation
simulators
Simulators
Irradiation
irradiation
Acoustic impedance
low resistance
high resistance
electrical resistance
Metals

Keywords

  • Chalcogenide glass
  • dosimetry
  • photodoping
  • reusable sensor
  • TCAD modeling
  • UV and gamma rays

ASJC Scopus subject areas

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

Cite this

Sensors based on radiation-induced diffusion of silver in Germanium selenide glasses. / Dandamudi, Pradeep; Kozicki, Michael; Barnaby, Hugh; Gonzalez Velo, Yago; Mitkova, M.; Holbert, Keith; Ailavajhala, M.; Yu, W.

In: IEEE Transactions on Nuclear Science, Vol. 60, No. 6, 6663709, 12.2013, p. 4257-4264.

Research output: Contribution to journalArticle

Dandamudi, Pradeep ; Kozicki, Michael ; Barnaby, Hugh ; Gonzalez Velo, Yago ; Mitkova, M. ; Holbert, Keith ; Ailavajhala, M. ; Yu, W. / Sensors based on radiation-induced diffusion of silver in Germanium selenide glasses. In: IEEE Transactions on Nuclear Science. 2013 ; Vol. 60, No. 6. pp. 4257-4264.
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