Acquisition of a New Generation Thermal Ionization Mass Spectrometer

EAR-0130631 SharmaPartial的资金用于购买新一代多收集器热电离质谱仪(TIMS)，该仪器可以对带正负电荷的离子束进行超高精度测量。达特茅斯学院将提供由乐器预期成本的50%组成的比赛。TIMS仪器将是地球科学部新的放射性同位素地球化学实验室的主要研究工具。将使用新的TIMS确定超高精度的Os和Nd3+同位素比率，目的是解决与地球和其他行星储藏库的起源和演化有关的问题。此外，还将进行Re、Os、Ir、Sm、Nd、U、Th、铅、Rb、锶和铁同位素的高灵敏度测量。新的TIMS设施将为达特茅斯的研究提供一个令人振奋的新维度，补充地球科学系现有的强大研究项目，包括K-Ar地质年代学、有机地球化学和古海洋学、流域水文地球化学、气候变化、景观演变、地层学和盆地分析、水文学和地质力学以及构造学。其中许多项目都有放射性同位素成分，需要进入最先进的TIMS设施。此外，达特茅斯和新英格兰地区的其他研究人员和学生将能够使用新设施，从而进一步增长地球化学和物理科学方面的研究和教育。

EAR-0130631SharmaPartial funding is awarded towards the purchase of a new generation multi-collector Thermal Ionization Mass Spectrometer (TIMS), which permits ultra-high precision measurements of positively and negatively charged ion beams. The Dartmouth College will provide a match consisting of 50% of the expected cost of the instrument. The TIMS instrument will be the primary research tool in the new radiogenic isotope geochemistry laboratory in the Department of Earth Sciences. Ultra-high precision osmium and neodymium isotopic ratios will be determined using the new TIMS with the aim of addressing issues related to the origin and evolution of Earth and other planetary reservoirs. In addition, high sensitivity measurements of rhenium, osmium, iridium, samarium, neodymium, uranium, thorium, lead, rubidium, strontium, and iron isotopes will be performed. The new TIMS facility will provide an exciting new dimension to research at Dartmouth, complementing the extant strong research programs in the Department of Earth Sciences, which include K-Ar geochronology, organic geochemistry and paleoceanography, hydrogeochemistry of watersheds, climate change, landscape evolution, stratigraphy and basin analysis, hydrology and geomechanics, and tectonics. Many of these programs have a radiogenic isotope component and require access to a state-of-the-art TIMS facility. Additionally, other researchers and students at Dartmouth and in New England region will be able to use the new facility, resulting in further growth of research and education in geochemistry and in physical sciences.