Ionisation density dependence of the optically and thermally stimulated luminescence from Al2O3:C |
| |
Authors: | Yukihara Eduardo G McKeever Stephen W S |
| |
Affiliation: | Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA. eduyuk@okstate.edu |
| |
Abstract: | This paper presents an overview of recent results on ionisation density dependence of the thermally stimulated luminescence (TL) and optically stimulated luminescence (OSL) signals from Al2O3:C, with emphasis on the sensitivity, efficiency, shape of the TL/OSL curves and the emission spectrum. High-ionisation densities are created uniformly by accumulated high doses of low-linear energy transfer radiation (gamma, beta, X rays) or non-uniformly in heavy charged particle tracks, even at low fluences, as in the case of space radiation fields. Significant deep trap filling, which occurs at these high-ionisation densities, ultimately results in changes in the concentration of recombination centres (F+-centres) and, consequently, in sensitivity changes and other effects. An OSL emission band at 335 nm has been observed in addition to the main F-centre luminescence band, and the relative intensities of these bands have been observed to be dependent on the ionisation density. The implications of these results and open issues are discussed. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|