Facility Support: Purdue Rare Isotope Measurement Laboratory

0851981 Caffee该拨款为普渡大学普渡稀有同位素测量实验室（PRIME Lab）的运营和维护提供三年的持续部分支持，该实验室是地球科学和辅助领域的多用户国家设施。 对这一设施的支持使地球科学家能够利用PRIME的加速器质谱仪和化学制备设施的专门能力，测量极低水平宇宙成因核素10 Be、14 C、26 Al、36 Cl、41 Ca和129 I，进行年代学和（或）示踪研究。 该设施目前正在开发其他稀有同位素的其他分析技术，以应用于陨石学和其他领域。 资金为PI教职员工，专业和技术人员提供小额工资支持; AMS系统的维护支持，包括更换部件;以及化学实验室的消耗品。 额外的运营费用（约50%）来自普渡大学，样品测量服务的费用，以及PI的研究赠款。S. 用加速器质谱法测量宇宙成因放射性核素继续支持地球表面过程和第四纪地质学、水文学和冰川学方面的新研究，这些研究依靠表面照射年龄测定、侵蚀速率估计和同位素示踪技术来量化过程速率。 PRIME实验室仍然是世界上唯一一个为AMS放射性核素系统（放射性碳除外）提供测量和应用服务的AMS实验室，也是目前唯一一个通过AMS测量提供全面服务和化学制备的实验室。 PRIME实验室的主要研究员继续开发新的AMS化学分离和测年技术，并积极资助研究和研究培训计划，这些计划涉及将这些放射性核素应用于各种地球科学问题。

0851981CaffeeThis grant provides three years of continued partial support for the operation and maintenance of the Purdue Rare Isotope Measurement Laboratory (PRIME Lab)at Purdue University as a multi-user national facility for the geosciences and ancillary fields. Support for this Facility allows geoscientists access to specialized capabilities of the accelerator mass spectrometer and chemical preparation facilities at PRIME for the measurement of the very low-level cosmogenic nuclides 10Be, 14C, 26Al, 36Cl, 41Ca, and 129I for chronological and/or tracer studies. The Facility is currently developing techniques for other analysis of other rare isotopes with application to meteoritics and other fields. Funding provides minor salary support for PI faculty members, professional and technical staff members; maintenance support for the AMS system, including replacement parts; and expendable supplies for the chemistry laboratory. Additional operating expenses (about 50%) are derived from Purdue University, charges for sample measurement services, and research grants to the PI?s. The measurement of cosmogenic radionuclides by accelerator mass spectrometry (AMS) continues to support novel research in Earth surface processes and Quaternary geology, hydrology and glaciology which rely on surface exposure age dating, erosion rate estimates and isotopic tracer techniques for quantification of process rates. PRIME lab continues to be one of the only AMS labs worldwide that offers measurement and application services for AMS radionuclide systems other than radiocarbon and is currently the only laboratory that offers full service, chemical preparation through AMS measurement. PRIME Lab PIs continue to develop new AMS chemical separation and dating techniques and maintain actively funded research and research training programs that involve application of these radionuclides to a variety of geoscience problems.