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Start Over Author "Peter T. Dickens" Journal journal of applied physics
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1. Increased luminescence and improved decay kinetics in lithium and cerium co-doped yttrium aluminum garnet scintillators grown by the Czochralski method

Author

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

Subjects
010302 applied physics, Materials science, Photoluminescence, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, 02 engineering and technology, Yttrium, 021001 nanoscience & nanotechnology, Alkali metal, 01 natural sciences, Thermoluminescence, Cerium, chemistry, 0103 physical sciences, Lithium, Charge carrier, 0210 nano-technology, Luminescence, Nuclear chemistry
Abstract

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.

Published
2017

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