X-ray spectroscopy
Conference
·
OSTI ID:560161
- Univ. of California, Berkeley, CA (United States)
EXAFS has been a valuable tool for bioinorganic structure analysis for two decades. Dramatic improvements in x-ray optics, detectors, and sources now permit many other types of x-ray experiments. Transition metal L-edge spectroscopy in the 500-1000 eV region reveals rich information about electronic structure. X-Ray magnetic circular dichroism (XMCD) offers powerful sum rules that can be used to determine spin and orbital angular momentum. XMCD also permits selectivity for the paramagnetic components of a metalloprotein. High resolution x-ray fluorescence spectroscopy is sensitive to oxidation state and spin state, and it complements the information revealed in absorption spectra. It also allows spin-polarized EXAFS (SPEXAFS) on dilute samples. This talk will illustrate the application of these techniques to bioinorganic samples. Specific systems include blue Cu and Fe-S proteins, Ni hydrogenases and CO dehydrogenases, nitrogenase, and the Mn in photosystem II.
- OSTI ID:
- 560161
- Report Number(s):
- CONF-970443--
- Country of Publication:
- United States
- Language:
- English
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· Proceedings of the National Academy of Sciences of the United States of America; (United States)
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OSTI ID:5259912