ESR测年研究中水成沉积物对不同人工辐照剂量率响应初探  

Dose response of artificial irradiation of fluvial sediment sample for ESR dating

作　　者：刘春茹[1] 尹功明[1] 高璐[1] 李建平[1] 林敏[1,2] 韩非[1] 

机构地区：[1]中国地震局地质研究所,地震动力学国家重点实验室,北京100029 [2]中国原子能科学研究院计量测试部,北京102413

出　　处：《核技术》2011年第2期95-98,共4页Nuclear Techniques

基　　金：地震动力学国家重点实验室自主研究课题(LE-09-04);国家自然科学基金(40902051);中央级公益性科研院所基本科研业务费专项(DF-IGCEA-0608-2-17)共同资助

摘　　要：本文以水成沉积物为研究对象,在实验室常用辐照剂量率1×10–1–1×102 Gy/min范围内,选择不同的剂量率对同种样品进行辐照,观察不同剂量率辐照下Al心ESR信号的剂量响应曲线特征。实验结果表明,不同人工辐照剂量率对水成沉积物样品的剂量响应特征没有影响,现有的人工辐照技术能够满足我们的实验要求。ESR dating samples need be irradiated to obtain dose response curve and the equivalent dose. The artificial dose rate is about 1 × 10-1-1 × 10^2 Gy/min, whereas the natural dose rate is about 3 Gy/ka. Therefore, one must be sure whether the much higher artificial dose rate is suitable for the ESR dating study. In this paper, we use different artificial dose rate to irradiate the same fluvial sample and measure the quartz A1 centre ESR signal under the same conditions. The dose response curves are compared, in an attempt to gain a preliminary knowledge on that problem and build a good foundation for our ESR dating studies on fluvial samples.

关 键 词：人工辐照 剂量率 沉积物 ESR 石英 

分 类 号：P593[天文地球—地球化学]