Kinetic simulation of dose-rate effects in the irradiation stage of LiF:Mg,Ti (TLD-100): A model based on hole release via V3-Vk transformation - Implications to TL efficiency

被引：7

作者：

Eliyahu, I. ^{[1
]}

Oster, L. ^{[2
]}

Ginsburg, D. ^{[3
]}

Reshes, G. ^{[2
]}

Biderman, S. ^{[2
]}

Horowitz, Y. S. ^{[4
]}

机构：

[1] Soreq Nucl Res Ctr, Yavne, Israel

[2] Sami Shamoon Coll Engn, Phys Unit, Beer Sheva, Israel

[3] Ben Gurion Univ Negev, Dept Biotechnol, Beer Sheva, Israel

[4] Ben Gurion Univ Negev, Phys Dept, Beer Sheva, Israel

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2019年 / 440卷

关键词：

Kinetic simulations; Conduction band/valence band; Optical absorption dose response; Dose rate; DELOCALIZED RECOMBINATION APPLICATION; RATE DEPENDENCE; OPTICAL-ABSORPTION; THERMOLUMINESCENCE;

D O I：

10.1016/j.nimb.2018.10.021

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The possibility of undiscovered dose-rate effects in the thermoluminescence (TL) of LiF:Mg,Ti (TLD-100) remains an open question. Previous experimental investigations are inconclusive and have been recently criticized. Earlier kinetic calculations have predicted the likelihood of dose-rate effects mainly based on competition between excitation and trapping rates. In this study we discuss the possibility of dose rate effects due to the likely dependence on dose-rate of V-3 creation (a two hole center) and transformation to V-K one hole centers via electron capture. Kinetic simulations demonstrate that such a dependence can lead to significant changes in the concentrations of the luminescent centers (LCs) following irradiation and consequently to expected changes in the TL response associated with these LCs. The simulations also predict changes in the concentration of the hole only and electron-hole configurations of the spatially correlated trapping center-luminescent center giving rise to peaks 4 and 5a respectively in the glow curve of TLD-100. The results further emphasize the importance of highly controlled experimental studies.

引用

页码：139 / 145

页数：7

共 20 条

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