A Mossbauer Spectrometer System for Earth Sciences

这笔奖金提供了购买穆斯堡尔光谱仪系统所需资金的一半，该系统将在华盛顿大学地质科学系首席研究员的实验室安装和操作。所需的剩余资金将由大学提供。Fe-57的穆斯堡尔谱是研究各种地球化学现象的一个有价值的工具。新的光谱仪将具有非常高的分辨率，并配备一个高温炉和一个液氦低温恒温器，用于研究从“沙漠清漆”和海洋沉积物中的细粒度、结晶性差的铁矿物到火成岩和变质岩中的矿物以及纯合成硅酸铁矿物等地球材料。在这些样品中要研究的现象包括氧化态、细晶（“x射线无定形”）矿物的表征、镁铁硅酸盐的有序-无序、混合价铁矿物的热激活电子离域和含铁硅酸盐的磁相变。

This award provides one-half of the funds required to purchase a Mossbauer spectrometer system to be installed and operated in the Principal Investigator's laboratory in the Department of Geological Sciences at the University of Washington. The remaining funds required will be provided by the University. Mossbauer spectroscopy on Fe-57 is a valuable tool for the study of a variety of phenomena of geochemical interest. The new spectrometer will be capable of very high resolution and equipped with a high-temperature furnace and a liquid helium cryostat for the study of earth materials ranging from fine-grained, poorly crystallized iron minerals in a "desert varnish" and oceanic sediments to minerals from igneous and metamorphic rocks and pure synthetic iron silicate minerals. The phenomena to be studied in such samples include oxidation states, characterization of fine- grained ("X-ray amorphous") minerals, order-disorder in ferromagnesian silicates, thermally activated electron delocalization in mixed-valence iron minerals and magnetic phase transitions in iron bearing silicates.