牙齿化石中由辐照产生的陷阱电子的热稳定性研究

STUDY ON THERMOSTABILITY OF RADIATED TRAPPED ELECTRONS IN TOOTH FOSSIL

本文对周口店北京猿人遗址的动物牙齿化石进行了辐照产生的陷阱捕获电子的热稳定性研究和釉质样品及牙质样品的热稳定性对比实验。得到釉质样品中g=2.0016 ESR峰的寿命为7.1×10~6年(20℃)。说明了取该峰进行ESR年代测定的可信性和用釉质样品进行ESR年代测定的必要性。

This paper reports on the study of thermostability of radiated trapped electrons in tooth fossil. The samples of tooth fossil were collected from the Peking ?Man site at zhoukoudian. We made a comparison of thermostability between enamel and dentin and got that the mean-live of the ESR signal (g = 2.0016) is 7.1×10~6 years (20℃). The result shows that it is reliable to date by this signal (g =2.0016). Choosing enamel sample for dating is more appropriate.