Increased luminescence and improved decay kinetics in lithium and cerium co-doped yttrium aluminum garnet scintillators grown by the Czochralski method

Dickens, Peter T.; Haven, Drew T.; Friedrich, Stephan; Saleh, Muad; Lynn, Kelvin G.

doi:10.1063/1.4978376

Title: Increased luminescence and improved decay kinetics in lithium and cerium co-doped yttrium aluminum garnet scintillators grown by the Czochralski method

Journal Article · 24 March 2017 · Journal of Applied Physics

DOI: https://doi.org/10.1063/1.4978376 · OSTI ID:1463012

Dickens, Peter T. ^[1]; Haven, Drew T. ^[1]; Friedrich, Stephan ^[2]; Saleh, Muad ^[1];

^[1]

Washington State Univ., Pullman, WA (United States). Center for Materials Research
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

In this study, four yttrium aluminum garnet single crystals co-doped with cerium and lithium were produced by the Czochralski method and the scintillation and defect properties were investigated. Our results demonstrated an increase in luminescence with Li co-doping as well as elimination of longer decay times. Surprisingly, although Li is monovalent, no oxidation of cerium from Ce³⁺ to Ce⁴⁺ was found as would be expected to maintain charge neutrality. Additionally, thermoluminescence results indicated a reduction in the trapping of charge carriers by shallow and deep traps, and room temperature photoluminescence measurements showed an improvement in the Ce³⁺ 5d to 4f transition efficiency.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1463012

Report Number(s):: LLNL-JRNL--737550; 889897

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 121; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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