title: High-resolution X-ray fluorescence and excitation spectroscopy of metalloproteins.
abstract: A spectrograph has been developed with sufficient efficiency to make high-resolution fluorescence experiments on metalloproteins possible. The resolution of this spectrometer can reach 0.45 eV at 7.1 keV emission energy. The focus images of this multiple curved-crystal array spectrometer are presented. The chemical sensitivity of Kbeta emission spectra can be used to identify chemical states, and the spin-polarized near-edge structure provides a new measure of the spin density. The high-resolution fluorescence metalloprotein studies should become routine with third-generation synchrotron facilities, and the strength of both site and spin selectivity should complement the structural information from other spectroscopies.
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: M M
authors.initials: MM
authors.lastname: Grush
authors.forename: A G
authors.initials: AG
authors.lastname: Froeschner
authors.forename: S P
authors.initials: SP
authors.lastname: Cramer