Proton damage in (Y,Lu,Gd)3(Al,Ga)5O12:Ce mixed garnet scintillators

Tafoya, Landon Reese; Geppert-Kleinrath, Verena; Smith, Erick; McClellan, Kenneth James; Pestovich, Kimberly Shay; Richards, Cameron Gregory; Wiggins, Brenden W.

doi:10.1063/5.0101866

Proton damage in (Y,Lu,Gd)₃(Al,Ga)₅O₁₂:Ce mixed garnet scintillators

Journal Article · Wed Oct 26 00:00:00 EDT 2022 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0101866· OSTI ID:1897439

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Scintillators are vital components for nuclear instrumentation and its applications, including plasma diagnostics and imaging. As yields in controlled fusion experiments increase, the radiation tolerance of scintillator candidates for use in instrumentation is of particular importance. High radiation exposure can damage scintillating materials and alter the optical properties. The effects of radiation damage in Ce-doped mixed garnet ceramics over the compositional range (Y,Gd,Lu)₃(Al,Ga)₅O₁₂ are investigated using optical techniques. The samples were exposed to 200 keV protons to an accumulated fluence of 10¹⁶ protons per square centimeter, then characterized using diffuse reflectance spectroscopy (DRS). DRS with visible light can assess the radiation tolerance of opaque poly-crystalline samples, which can be easily sintered from powders and thus offer distinct advantages in characterization compared to single crystals. Qualitative trends in induced absorption are presented as a function of composition, and the ideal cerium dopant concentration for Y₂LuAl₅O₁₂ is determined to be 0.60–0.75 mol.%.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1897439

Alternate ID(s):: OSTI ID: 1894749

Report Number(s):: LA-UR-22-25060

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 93; ISSN 0034-6748

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

Country of Publication:: United States

Language:: English

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Proton damage in (Y,Lu,Gd)3(Al,Ga)5O12:Ce mixed garnet scintillators

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References (14)

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Proton damage in (Y,Lu,Gd)₃(Al,Ga)₅O₁₂:Ce mixed garnet scintillators