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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
Author(s) -
Foster Camera,
Wu Yuntao,
Koschan Merry,
Melcher Charles L.
Publication year - 2018
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800280
Subject(s) - scintillator , scintillation , photoelectric effect , photomultiplier , yield (engineering) , photon , crystal (programming language) , physics , scintillation counter , resolution (logic) , analytical chemistry (journal) , materials science , optics , chemistry , detector , chromatography , computer science , thermodynamics , programming language , artificial intelligence
In this study, we demonstrated a drastic improvement in energy resolution of (Lu 0.75 Y 0.25 ) 3 Al 5 O 12 :Pr (LuYAG) single crystal scintillators from 4.8% to 4.1% at 662 keV upon Li + codoping, which is the best value ever reported in the class of oxide single crystal scintillators. Li + codoping can also significantly enhance its scintillation yield from 16 000 to 25 000 photons MeV −1 , but slightly prolong the scintillation decay time. As Li + codoping was found to have a negligible effect on the light yield non‐proportionality, we attributed the significant improvement in energy resolution to the reduced statistical variance in the number of photoelectrons produced in the photomultiplier tube ( R stat ).