Mady F, Bindi R, Iacconi P, Wrobel F
LPES-CRESA (EA 1174), Université de Nice Sophia-Antipolis, Faculté des Sciences, Parc Valrose, 06108, Nice Cedex 2, France.
Radiat Prot Dosimetry. 2006;119(1-4):37-40. doi: 10.1093/rpd/nci609. Epub 2006 Apr 27.
Numerical simulations based on standard rate equations are carried out to study the dependence of the thermoluminescence (TL) response on the absorbed dose. The model, which includes thermally stimulated exoelectronic emission (TSEE), uses three electron traps--two active and one thermally disconnected (TD)--and one deep hole trap acting as a recombination centre. After instantaneous creation of a given dose of electron-hole pairs, one first follows isothermal recombination and trap filling before simulating the TL readout. Influence of TD traps and specific effects due to trap saturation are illustrated. A systematic study of the TL response is performed in wide ranges of the determining parameters. The dose dependence is found to be quadratic, linear or intermediate according to their relative values. Results are explained in terms of recombination-trapping competition, trap occupancy and in relation with the presence of TSEE.
基于标准速率方程进行了数值模拟，以研究热释光（TL）响应与吸收剂量的依赖关系。该模型包括热激发外逸电子发射（TSEE），使用三个电子陷阱——两个活性陷阱和一个热断开（TD）陷阱，以及一个作为复合中心的深空穴陷阱。在瞬间产生给定剂量的电子-空穴对后，首先进行等温复合和陷阱填充，然后模拟TL读出。说明了TD陷阱的影响以及陷阱饱和导致的特定效应。在确定参数的广泛范围内对TL响应进行了系统研究。根据它们的相对值，剂量依赖性被发现是二次的、线性的或中间的。结果根据复合-俘获竞争、陷阱占有率以及与TSEE的存在关系进行了解释。
