Instrument Development For X-ray Magnetic Circular Dichroism

X射线磁圆二色性仪器的研制

• 批准号: 9105323
• 负责人: Stephen Cramer
• 金额: $ 36.53万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105323&HistoricalAwards=false
• 关键词: Instrument; Development; ray; Magnetic; Circular

We propose to develop an instrument for x-ray magnetic circular dichroism experiments on paramagnetic samples of bioinorganic interest. It will record fluorescence-detected x-ray absorption spectra (XAS) and x-ray magnetic circular dichroism (XMCD) measurements. The device will be optimized for the vanadium through copper L-edges (500-1000 eV). Preliminary experiments will be conducted on paramagentic V, Mn, Fe, Cu and Mo model compounds with known molecular structure and magnetic properties. Crystallographically characterized small proteins such as azurin and various ferrodoxins will also be examined. The x-ray sources and monochromators for this project are provided by national synchrotron radiation laboratories (NSLS and SSRL). Ultimately, the instrument will be used at the Advanced Light Source, a new high brightness soft x-ray ring under construction in Berkeley.

我们建议开发一种对生物无机感兴趣的顺磁性样品进行X射线磁性圆二色实验的仪器。它将记录荧光检测的X射线吸收光谱(XAS)和X射线磁性圆二色谱(XMCD)测量结果。该器件将针对通过铜L边缘(500-1000 eV)的钒进行优化。将对已知分子结构和磁性的顺磁化V、Mn、Fe、Cu和Mo模型化合物进行初步实验。结晶学特征的小蛋白，如天青素和各种铁蛋白也将被检测。该项目的X射线源和单色仪由国家同步辐射实验室(NSLS和SSRL)提供。最终，该仪器将用于高级光源，这是伯克利正在建设的一种新的高亮度软X射线环。