Dose recovery tests using Ti-related ESR signals in quartz: First results

详细信息    查看全文

• 作者：Koen Beerten ; Sarah Rittner ; Johanna Lomax ; Ulrich Radtke
• 关键词：ESR dating ; Quartz ; Aeolian sediments ; Pleistocene ; Murray Basin ; Australia
• 刊名：Quaternary Geochronology
• 出版年：2008
• 出版时间：February-May 2008
• 年：2008
• 卷：3
• 期：1-2
• 页码：143-149
• 全文大小：260 K

文摘

Experimental results from ESR dose recovery tests using Ti-related absorption lines in sedimentary quartz will be presented and discussed. The tests were performed on two Late Pleistocene Australian dune sands with a known burial dose based on OSL measurements. The regenerative dose technique (after thermal annealing) was used to detect any differences between ESR estimates of the natural dose, and ESR estimates of an equal laboratory gamma-dose. The studied absorption lines show consistent results with regard to the laboratory dose, but inconsistencies regarding the recovery of the natural dose. Line-shape changes between the natural and artificially induced ESR signals are a matter of concern. These changes are probably the result of the different relative abundance of Ti–H and Ti–Li centres in the naturally irradiated and artificially irradiated sample.