4.5 Article

Ce:LaB3O6 glass for high-resolution radiation dosimetry

Journal

APPLIED PHYSICS EXPRESS
Volume 15, Issue 2, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.35848/1882-0786/ac4ad6

Keywords

thermoluminescence; dosimeter; glass; borate; Ce3+; radiation detection

Funding

  1. NIMS ICYS [ICYS9, QN3200]

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Ce:LaB3O6 (LBO) glass, doped with CeF3 and melted under a reducing atmosphere, demonstrates promising thermoluminescence dosimetry capabilities with high quantum efficiency. The optimum concentration for optimal performance is 0.1%, with an interatomic distance of approximately 4 nm. Ce:LBO shows good dose resolution and can be cyclically irradiated and read without degradation.
Ce:LaB3O6 (LBO) glass, whose constituents are abundant elements and fabrication is easy and cheap, is found to be a promising thermoluminescence (TL) dosimeter. This is originally achieved by CeF3 doping and melting under a reducing atmosphere, with the optimum concentration of 0.1% (quantum efficiency = 66%). The corresponding Ce interatomic distance is similar to 4 nm, below which concentration quenching occurs via Ce dipole-dipole interaction, as elucidated experimentally by Dexter's theory. Ce:LBO exhibits a good dose resolution, with a linear dependence covering five orders of magnitude on both irradiation-dose and TL-response. Furthermore, it can be cyclically irradiated and read without degradation.

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