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Ionic Conduction-Based Polycrystalline Oxide Gamma Ray Detection - Radiation-Ionic Effects.
Defferriere, Thomas; Helal, Ahmed Sami; Li, Ju; Rupp, Jennifer L M; Tuller, Harry L.
Afiliación
  • Defferriere T; Department of Material Science and Engineering, MIT, Cambridge, MA, 02139, USA.
  • Helal AS; Department of Nuclear Science and Engineering, MIT, Cambridge, MA, 02139, USA.
  • Li J; Nuclear Materials Authority, Katameya, 3rd Settlement, Cairo, 11936, Egypt.
  • Rupp JLM; Department of Material Science and Engineering, MIT, Cambridge, MA, 02139, USA.
  • Tuller HL; Department of Nuclear Science and Engineering, MIT, Cambridge, MA, 02139, USA.
Adv Mater ; 36(24): e2309253, 2024 Jun.
Article en En | MEDLINE | ID: mdl-38380958
ABSTRACT
Newly discovered opto-ionic effects in metal oxides provide unique opportunities for functional ceramic applications. The authors generalize the recently demonstrated grain boundary opto-ionic effect observed in solid electrolyte thin films under ultraviolet (UV) irradiation to a radiation-ionic effect that can be applied to bulk materials and used for gamma-rays (γ-rays) detection. Near room temperature, lightly doped Gd-doped CeO2, a polycrystalline ion conducting ceramic, exhibits a resistance ratio change ≈103 and reversible response in ionic current when exposed to 60Co γ-ray (1.1 and 1.3 MeV). This is attributed to the steady state passivation of space charge barriers at grain boundaries, that act as virtual electrodes, capturing radiation-induced electrons, in turn lowering space charge barrier heights, and thereby exclusively modulating the ionic carrier flow within the ceramic electrolytes. Such behavior allows significant electrical response under low fields, that is, < 2 V cm-1, paving the way to inexpensive, sensitive, low-power, and miniaturizable solid-state devices, uniquely suited for operating in harsh (high temperature, pressure, and corrosive) environments. This discovery presents opportunities for portable and/or scalable radiation detectors benefiting geothermal drilling, small modular reactors, nuclear security, and waste management.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania