Dose and dose rate dependence of time-resolved OSL from Korean paleosol quartz

被引：7
|
作者：
Kim, M. J. [1 ]
Choi, J. H. [2 ]
Hong, D. G. [1 ]
机构：
[1] Kangwon Natl Univ, Dept Phys, Chunchon 200701, Gangwon Do, South Korea
[2] Korea Basic Sci Inst, Geochronol Team, Taejon 305333, South Korea
来源：
RADIATION MEASUREMENTS | 2011年 / 46卷 / 12期
关键词：
TR-OSL; Dose dependence; Dose rate dependence; X-ray irradiation; OPTICALLY STIMULATED LUMINESCENCE; POINT-DEFECTS;
D O I：
10.1016/j.radmeas.2011.03.022
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：
Using a newly developed small X-ray irradiator equipped with a mini X-ray generator (Varian VF-50J) and TR-OSL measurement system attached to an MCS (ORTEC MCS-PCI), the influence of dose and dose rate of X-ray radiation on TR-OSL was investigated in paleosol quartz from the Chungdang-dong paleolithic site, Korea. All lifetimes were calculated by a curve-fitting method using a single stretched-exponential function with beta = 0.86. Physical characteristics, natural lifetime, thermal quenching activation energy Delta E, and thermal assistance activation energy E-a were firstly determined. From the results of the investigation of dependence on dose and dose rate of X-ray radiation using fully bleached samples, the lifetime decreased significantly to about 20 its: when the X-ray dose was increased to 300 Gy at a dose rate of 0.5 Gy/s. Also, despite different radiation dose rates, at a dose of 50 Gy both lifetime and related intensity were independent of dose rate change. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1518 / 1521
页数：4
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