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 · Fri Mar 24 00:00:00 EDT 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 Lab. (LLNL), Livermore, CA (United States)

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

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1463012

Alternate ID(s):: OSTI ID: 1349377

Report Number(s):: LLNL-JRNL-737550; 889897; TRN: US1902248

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

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

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Improvements in Light Yield and Energy Resolution by Li ⁺ Codoping (Lu _0.75 Y _0.25 ) ₃ Al ₅ O ₁₂ :Pr ³⁺ Single Crystal Scintillators Foster, Camera; Wu, Yuntao; Koschan, Merry physica status solidi (RRL) - Rapid Research Letters, Vol. 12, Issue 9 https://doi.org/10.1002/pssr.201800280	journal	July 2018
Improved Nd distribution in Czochralski grown YAG crystals by implementation of the accelerated crucible rotation technique Saleh, Muad; Kakkireni, Saketh; McCloy, John Optical Materials Express, Vol. 10, Issue 2 https://doi.org/10.1364/ome.380174	journal	January 2020

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