EPR测年中样品顺磁中心的热稳定性研究

波谱学杂志 ›› 1994, Vol. 11 ›› Issue (4): 377-381.

EPR测年中样品顺磁中心的热稳定性研究

梁任又

中国科学技术大学结构分析开放实验室, 合肥 230026

收稿日期:1993-11-06 修回日期:1994-03-08 出版日期:1994-12-05 发布日期:2018-01-20

STUDY ON THERMAL STABILITY OF RARAMAGNETIC CENTER OF SAMPLES IN EPR DATING

Liang Renyou

Structre Research Laboratory, University of Science and Technology of China, Hefei 230026

Received:1993-11-06 Revised:1994-03-08 Online:1994-12-05 Published:2018-01-20

摘要/Abstract

摘要： EPR测年法中,样品中由辐照产生的顺磁中心的热稳定性与其本身结构以及样品埋藏地点的环境温度有关.一般用平均寿命来表示该性质.顺磁中心的寿命直接关系到EPR测年上限,所以对它的研究是EPR测年法基础研究的重要部分.本文用等温度退火实验研究了5种不同样品的不同顺磁中心的热稳定性,测出了它们在20℃时的平均寿命、活化能和频率因子.

关键词: 顺磁中心, 热稳定性, 平均寿命

Abstract: EPR dating is based on the detection of paramagnetic center created by natural radioactivity in a sample. The thermal stability of the paramagnetic center is related to the characteristics of the structure of the sample and the environmental temperature of sample site. We use mean life τ to express the thermal stability. Because the limit of EPR dating depends on the mean life, the research of thermal stability is an important part of fundamental researches for EPR dating. We studied thermal stability of diffrent paramagnetic centres of five samples by isothermal annealing experiments, and determined their mean life at 20℃,activation energy and frequency factor respectively.

Key words: Paramagnetic center, Thermal stability, Mean life

梁任又. EPR测年中样品顺磁中心的热稳定性研究[J]. 波谱学杂志, 1994, 11(4): 377-381.

Liang Renyou. STUDY ON THERMAL STABILITY OF RARAMAGNETIC CENTER OF SAMPLES IN EPR DATING[J]. Chinese Journal of Magnetic Resonance, 1994, 11(4): 377-381.

[1]	汪雷敏, 潘铁英, 史新梅, 周丽芳, 吴翔. IPDI的NMR数据解析[J]. 波谱学杂志, 2005, 22(1): 79-84.
[2]	单志华, 刘其则, 朱正和, 何有节. 含Cr (Ⅲ)溶液中配位水质子的¹H NMR研究[J]. 波谱学杂志, 1993, 10(3): 303-308.