New Automated thermoluminescence/optically stimulated luminescence (TL/OSL) Reader for Luminescence Dating

用于发光测年的新型自动热释光/光刺激发光 (TL/OSL) 读数器

• 批准号: 0113624
• 负责人: James Feathers
• 金额: $ 6.87万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0113624&HistoricalAwards=false
• 关键词: New; Automated; thermoluminescence; optically; stimulated

With support from the National Science Foundation, the University of Washington luminescence dating laboratory headed by Dr. James Feathers will purchase a Riso automated TL/OLS reader with automated processor which permits single grain luminescence determinations. Because of its increased efficiency over the instrument the laboratory currently employs, the Riso machine will both increase throughput and decrease cost per sample.The Washington laboratory is the sole facility in the United States which routinely provides several types of luminescence analysis (TL, OSL, IRSL) for archaeological samples and the resultant dates have come to play an increasingly important function for archaeologists. Because organic materials are present in only a limited number of sites many such occurrences are not amenable to radiocarbon dating and often luminescence provides the only alternative. Using a range of approaches it often possible to obtain dates from either ceramics or soil and in the former case luminescence has an advantage over radiocarbon since it can directly date the object of interest rather than associated material. Dr. Feathers has shown that luminescence may be as accurate as radiocarbon. Traditional luminescence techniques analyze bulk samples comprised of many individual grains and the results can be problematic since particles of multiple ages and exposure histories may be present. Machines such as the Riso automated reader avoid this problem since they can date individual grains. A distribution of individual readings provides insight into the nature of the sample itself - both admixture and differential degree of bleaching - and therefore the multiple determinations allow accuracy to be better determined.Dr. Feathers' research is directed at both improvement of the technique itself and its application to anthropologically significant archaeological sites. He has addressed questions such as the development of complex societies in the southern United States, the time of human entry into the New World and the emergence of modern human behavior in sub Saharan Africa. Acquisition of the Riso instrument will significantly increase the effectiveness of such research.

在美国国家科学基金会的支持下，由James Feathers博士领导的华盛顿大学发光测年实验室将购买一台带有自动处理器的Riso自动TL/OLS阅读器，该阅读器可以进行单颗粒发光测定。由于其提高了效率的仪器，实验室目前采用的Riso机器将增加吞吐量和降低成本，每个sample.The华盛顿实验室是唯一的设施，在美国，定期提供几种类型的发光分析（TL，OSL，IRSL）的考古样品和由此产生的日期已经发挥越来越重要的功能，考古学家。由于有机物质只存在于有限的几个地点，许多这样的地点不适合放射性碳测年，通常发光提供了唯一的选择。使用一系列的方法，往往可以从陶瓷或土壤中获得日期，在前一种情况下，发光比放射性碳更有优势，因为它可以直接确定感兴趣的对象的日期，而不是相关的材料。费瑟斯博士已经证明，发光可能和放射性碳一样精确。传统的发光技术分析由许多单个颗粒组成的批量样品，并且结果可能是有问题的，因为可能存在多个年龄和暴露历史的颗粒。像Riso自动阅读器这样的机器避免了这个问题，因为它们可以确定单个谷物的日期。单个读数的分布提供了对样本本身性质的洞察-混合物和漂白程度的差异-因此，多重测定可以更好地确定准确性。Feathers博士的研究旨在改进技术本身及其在人类学上重要的考古遗址中的应用。他提出了一些问题，如美国南部复杂社会的发展，人类进入新世界的时间以及撒哈拉以南非洲现代人类行为的出现。购置Riso仪器将大大提高这类研究的效力。