电子自旋共振年代计时(III)——关于鹿牙和牛牙化石的研究

ESR DATING(III)——A STUDY OF FOSSILS OF DEER TOOTH AND OX TOOTH

采用电子自旋共振年代计时方法测定了贵州桐梓马鞍山的鹿牙化石及河北迁安爪村牛牙化石的年龄,它们分别为(1.5±0.2)×10~4a和(3.7±0.5)×10~4a。在研究作为ESR信号来源的顺磁缺陷中心的性质时,还应用了正电子湮没技术。

The ages of fossils of deer tooth and ox tooth, from Maanshan Tongzi in Gui-zhou and Zhaocun Qianan in Hebei respectively, have been determined by usingESR dating. The age of the deer tooth is (1.5±0.2)×10~4 a and that of the ox toothis (3.7±0.5)×10~4 a. The property of trapped center, as the source of ESR signal,has been preliminarily established with positron annihilation technique.