A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO<sub>4</sub>:Tm TLD

ZHANG Keqi CHEN Jie LU Yanchou WANG Changsheng YANG Chuancheng

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A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO₄:Tm TLD

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- A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO₄:Tm TLD
- NUCLEAR TECHNIQUES Issue 11, (2007)
- 作者机构：
  
  1. 中国地震局地质研究所地震动力学国家重点实验室
  2. ,北京,100029
- 作者简介：
- 基金信息：
  
  城市活断层探测与地震危险性评价项目(1-4-37-2-5-1);地震科学联合基金重点课题(201018)资助
- DOI：
  CLC： TL81
- Published：01 November 2007
- 稿件说明：
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[1]张克旗,陈杰,卢演俦,王昌盛,杨传成.Daybreak 2200型自动化光释光测量仪的初步定量评估[J].核技术,2007(11):905-910.

ZHANG Keqi CHEN Jie LU Yanchou WANG Changsheng YANG Chuancheng. A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO₄:Tm TLD[J]. Nuclear techniques, 2007, (11): 905-910.
[1]张克旗,陈杰,卢演俦,王昌盛,杨传成.Daybreak 2200型自动化光释光测量仪的初步定量评估[J].核技术,2007(11):905-910. DOI：

ZHANG Keqi CHEN Jie LU Yanchou WANG Changsheng YANG Chuancheng. A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO₄:Tm TLD[J]. Nuclear techniques, 2007, (11): 905-910. DOI：

摘要

确认和定量检验释光自动化测量系统的性能指标和系统误差是释光年代学实验室非常重要的一项工作。用细颗粒石英和热释光CaSO

:Tm剂量片对Daybreak 2200型自动光释光测量仪长时间光激发/辐照对比邻测样的影响以及辐照泄漏、辐照源开关时间作了系统检测。长时间蓝光激发时比邻测样细颗粒石英发生非线性光晒退

激发10ks时其OSL信号损失不大于15%（光强为最大功率的95%）

而对更远位置的测样则几乎无影响。机载

Sr/

Yβ放射源在长时间辐照时对比邻测样的影响约为0.02%

对更远位置的样品几乎无影响。Daybreak 2200型测量仪机载β源的快门开关时间约为0.22s（相当于～0.01Gy）

β放射源在快门关闭时的泄漏极其微弱

测量时可不予考虑。12个代表性测片位置在测量时具有非常好的一致性

相对标准偏差不超过3%

具有非常低的系统误差。

Abstract

Daybreak 2200 OSL readers are widely used for luminescence dating applications.As the sample irradia- tion and illumination may affect discs in adjacent positions

it is critical to confirm that these factors do not introduce significant systematic errors.Effects of cross-irradiation and cross-bleaching were examined and quantified using fine-grain quartz and highly sensitive CaSO

:Tm dosimeters

and the irradiation offset time was measured.The cross-bleaching effect on adjacent aliquots is non-linear with no more than 15% OSL signal reduction following 10ks illumination with the power of blue LED being at 95% maximum.But at positions other than the nearest neighboring sample

almost no effect of cross-bleaching was found.The cross-talk dose

even to the nearest samples

was about 0.2‰of the applied dose

and it decreased with increasing distance from the source.Offset time of the built-in Beta source shutter is 0.22 s

which can be neglected in regular dating

and leak dose of the source can be ignored as well. Finally

measurement consistency at Position 0.5

…and 55 of the sample tray is better than 3% in relative stan- dard deviation.

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A preliminary discussion on measurements of SMAR equivalent dose of fine-grain quartz extracted from Ganzi loess

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Related Author

ZHANG Keqi

CHEN Shaowen1 HUANG Long1 ZHU Dehai1 TANG Qiang2 LIU Xiaowei2 1

黄龙

朱德海

唐强

刘小伟

LI Huhou

Related Institution

Institute of Geomechanics,Chinese Academy of Geological Sciences

Dongguan University of technology,Dongguan 523808,China) 2

中山大学物理科学与技术学院

Optical Dating Laboratory,Capital Normal University

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A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO4:Tm TLD

DOI：

摘要

Abstract

关键词

Keywords

references

A primary assessment of a Daybreak 2200 OSL reader using fine grain quartz and CaSO₄:Tm TLD