Nanodosimetric kinetic model incorporating localized and delocalized recombination: Application to the prediction of the electron dose response of the peak 5a/5 ratio in the glow curve of LiF:Mg,Ti (TLD-100)

被引：8

作者：

Eliyahu, I. ^{[1
,2
]}

Horowitz, Y. S. ^{[1
]}

Oster, L. ^{[3
]}

Druzhyna, S. ^{[1
]}

Mardor, I. ^{[2
]}

机构：

[1] Ben Gurion Univ Negev, IL-84105 Beer Sheva, Israel

[2] Soreq Nucl Res Ctr, IL-81800 Yavne, Israel

[3] Sami Shamoon Coll Engn, IL-84100 Beer Sheva, Israel

来源：

RADIATION MEASUREMENTS | 2014年 / 71卷

关键词：

Thermoluminescence; Delocalized recombination; Localized recombination; Ionization density; Dose response; LIF-MG; TI TLD-100;

D O I：

10.1016/j.radmeas.2014.01.015

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A kinetic model combining both localized and delocalized recombination is described which is based on different filling rates as a function of irradiation electron energy of a spatially correlated trapping center/luminescent center (TC/LC) complex. Following irradiation and thermal de-trapping the locally trapped electron-hole configuration is assumed to give rise to peak 5a and the e-only configuration to peak 5 in the glow curve of LiF:Mg,Ti (TLD-100). The model is capable of simulating the linear/supralinear dose response of composite peak 5, the dependence of the supralinearity on photon energy and the ratio of the intensities of peak 5a to peak 5 as a function of dose. However, this is achieved only by invoking the presence of band-tail states which allow thermally induced hopping leading to semi-localized recombination in the recombination mechanism of the e-only configuration. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：226 / 231

页数：6

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