Support for Applications of Accelerator Mass Spectrometry inthe Earth Sciences

该项目将支持罗切斯特大学核结构实验室在地球科学领域的加速器质谱（AMS）应用的发展。提高AMS技术分析同位素氯-36、碘-129、钙-41和锇-186/187的灵敏度将是该项目的主要重点。该项目的另一项成果将是与国家标准局合作，合成氯和碘的精确同位素浓度标准。加速器质谱法已经发展成为一项重要的技术，因为在许多情况下，它是唯一一种足够灵敏的方法，可以用来测量稀有同位素，以确定地质事件的年龄，并追踪地球内部物质的转移。

This project will support the development of Accelerator Mass Spectrometry (AMS) applications in the earth sciences at the Nuclear Structure Laboratory of the University of Rochester. Improvements in the sensitivity of the AMS technique for analyzing the isotopes chlorine-36, iodine-129, calcium-41 and osmium-186/187 will be a major focus of the project. Another product of the project will be the synthesis, in collaboration with the National Bureau of Standards, of accurate isotope concentration standards for chlorine and iodine. Accelerator Mass Spectrometry has developed into an important technique because it is in many cases the only method sensitive enough for the measurement of rare isotopes that can be used to date the age of geological events and to trace the transfer of matter within the Earth.