一种用于𝛾-transfer辐射源校准的新型石英

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Geochronometria Pub Date : 2020-01-01 DOI:10.2478/geochr-2020-0020

D. Richter, C. Woda, K. Dornich

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引用次数: 6

摘要

摘要对风沙中提取的石英颗粒(LexCal2014)作为辐射源标定传递材料的适用性进行了测试。经过热预处理后，该石英显示出适合转移校准的发光和剂量响应特性，在单aliquot (SAR)过程中，回收的β剂量对预热温度的依赖性很小，并且在β剂量回收方面具有令人满意的性能(各种实验的给定/测量β剂量为0.98−1.00)。通过SARA和插值程序获得额外的支持，其中来自γ剂量的LexCal2014的osll数据被插值到由待校准源照射的零LexCal2014石英的数据上。细粒材料的初步结果与粗粒材料的结果一致。3.00±0.07 Gy的γ剂量在亥姆霍兹中心(亥姆霍兹中心)的原子能机构/世卫组织二级标准剂量测定实验室(SSDL)以无散射的几何形状施加，吸收剂量计算通过蒙特卡罗模拟获得。

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A new quartz for 𝛾-transfer calibration of radiation sources

Abstract Quartz grains extracted from aeolian sand (LexCal2014) are tested for suitability as transfer material for radiation source calibration. After thermal pre-treatment, this quartz exhibits luminescence and dose-response properties which appear appropriate for transfer calibration purposes with little dependence of recovered β-dose on preheat temperature in the single aliquot (SAR) procedure and satisfying performance in β-dose recovery (0.98−1.00 given/measured β-dose for various experiments). Additional support is obtained by SARA and interpolation procedures, where OSL-data from γ-dosed LexCal2014 is interpolated on data obtained for zeroed LexCal2014 quartz, which is β-irradiated by the source to be calibrated. Initial results on fine-grain material agree with the coarse grain results presented. The γ-dose of 3.00 ± 0.07 Gy is administered in a scatter-free geometry at the IAEA/WHO Secondary Standard Dosimetry Laboratory (SSDL) of the Helmholtz Zentrum München, with absorbed dose calculations obtained by Monte Carlo simulations.

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来源期刊

Geochronometria 地学-地球科学综合

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Geochronometria is aimed at integrating scientists developing different methods of absolute chronology and using them in different fields of earth and other natural sciences and archaeology. The methods in use are e.g. radiocarbon, stable isotopes, isotopes of natural decay series, optically stimulated luminescence, thermoluminescence, EPR/ESR, dendrochronology, varve chronology. The journal publishes papers that are devoted to developing the dating methods as well as studies concentrating on their applications in geology, palaeoclimatology, palaeobiology, palaeohydrology, geocgraphy and archaeology etc.