Facility Support: The Purdue Rare Isotope Measurement Laboratory

设施支持：普渡大学稀有同位素测量实验室

• 批准号: 0452936
• 负责人: Marc Caffee
• 金额: $ 272.41万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-05-01 至 2010-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0452936&HistoricalAwards=false
• 关键词: Facility; Support; Purdue; Rare; Isotope

EAR-0452936CaffeeAlthough the application of cosmic-ray-produced (cosmogenic) nuclides in earth surface processes is relatively new, the impact of these studies is astonishing. Ten years ago it was difficult to measure the erosion rate of a landscape over a timescale relevant to geomorphology; few measurements existed, and these were often unreliable. Today, basin-wide erosion rates can be measured with cosmogenic 10Be and 26Al, almost routinely, by measuring their concentrations in stream sediment. The initial success of these studies portends an immense growth in the application of cosmogenic nuclides. The measurement of cosmogenic radionuclides is accomplished using accelerator mass spectrometry (AMS). AMS is an increasingly important tool that is applied to a variety of research problems spanning numerous earth science disciplines. The unique strength of AMS is its ability to measure isotopes of an element in which the abundance ratios range from 10-12 to 10-15. The nuclides most commonly measured by AMS include 10Be, 14C, 26Al, 36Cl, and 129I. These and other radionuclides are produced in a variety of geologic settings; their concentrations can serve as chronometers or tracers of naturally-occurring processes. As demand in the NSF scientific community for AMS measurements increases PRIME Lab must be able to meet this demand and assume leadership in both measurement capabilities and scientific applications. PRIME Lab's ultimate goal is to be the focus point for the measurement and application of AMS radionuclides in Earth sciences in the U.S. During the last several years numerous upgrades have been completed. These enhancements are enabling higher precision and faster measurements. During the next four years we anticipate both improvements in existing measurement capabilities and the development of new capabilities. These developments in AMS technology will proceed in parallel with new application of cosmogenic nuclides in the Earth sciences.

EAR-0452936 CAFFEELATHOUCH宇宙射线产生的（宇宙）核素在地球表面过程中的应用相对较新，这些研究的影响令人惊讶。十年前，很难衡量与地貌学相关的时间表的景观的侵蚀率。几乎没有测量，这些测量通常是不可靠的。 如今，盆地范围的侵蚀率几乎可以通过测量其在河流沉积物中的浓度来测量宇宙基因10BE和26AL。这些研究的最初成功预示着宇宙基因核素的应用巨大生长。使用加速器质谱法（AMS）来完成宇宙基因放射性核素的测量。 AMS是一个越来越重要的工具，可用于跨越许多地球科学学科的各种研究问题。 AMS的独特强度是它测量元素的同位素的能力，在该元素中，丰度比率为10-12至10-15。 AMS最常见的核素包括10BE，14C，26AL，36Cl和129i。 这些和其他放射性核素是在各种地质环境中产生的。它们的浓度可以用作天然过程的天文纪录或示踪剂。随着NSF科学界对AMS测量的需求增加，Prime Lab必须能够满足这一需求，并在测量能力和科学应用方面发挥领导作用。 Prime Lab的最终目标是成为在过去几年中，在美国地球科学中测量和应用AMS放射性核素的焦点。这些增强功能可实现更高的精度和更快的测量。在接下来的四年中，我们预计现有的测量能力和新功能的发展都会有所提高。 AMS技术中的这些发展将与地球科学中宇宙核素的新应用同行。