首页|Optical and thermal luminescence efficiencies of BeO exposed to low-energy protons and carbon ions
Optical and thermal luminescence efficiencies of BeO exposed to low-energy protons and carbon ions
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NSTL
Elsevier
Optically stimulated luminescence (OSL) and thermoluminescence (TL) are well-described phenomena utilized to measure the absorbed dose of crystalline materials. The techniques are used to monitor low linear energy transfer (LET) radiation (beta, gamma) as well as high-LET heavy charged particles (HCPs). Detector efficiency 'I-det, defined as the ratio of the luminescence per unit dose from a non-reference radiation field compared to the identical quantity from the reference field, is particle and energy dependent. The responses of BeO ceramics exposed to low-energy HCPs were investigated in this work. Dosimeters were bombarded with 1, 2, and 4 MeV protons, as well as 2 and 4 MeV carbon ions; these radiation qualities constitute a mean LET range of 37.6 keV/mu m -628 keV/mu m and were realized using the 2 MV tandem Pelletron particle accelerator at East Carolina University. Each dosimeter was calibrated using a dose response constructed with a(90)Sr/Y-90 beta source, which was calibrated against a(137)Cs gamma source. This enabled 'Idet to be calculated. It was observed that optical and thermal signal shape and magnitude depend on the mean LET. Furthermore, thermal efficiencies are significantly higher than optical efficiencies for all ions investigated.
NSTL
Elsevier
