title: Soft x-ray magnetic circular dichroism: a probe for studying paramagnetic bioinorganic systems.
abstract: Soft x-ray magnetic circular dichroism was used to study a paramagnetic bioinogranic system. We measured the Fe L edges of Pyrococcus furiosus rubredoxin, using circularly polarized synchrotron radiation, a split-coil super-conducting magnet, low sample temperatures, and fluorescence detection. The observed dichroism effect is strong (30%) and in general agreement with the calculation. The method is element- and oxidation state-specific, and the data can be interpreted by established theoretical procedures. Soft x-ray magnetic circular dichroism demonstrates enormous potential as a probe for studying paramagnetic systems in biology, chemistry, and material science.
authors.affiliation: Energy and Environment Division, Lawrence Berkeley Laboratory, CA 94720.
authors.forename: J
authors.initials: J
authors.lastname: van Elp
authors.forename: S J
authors.initials: SJ
authors.lastname: George
authors.forename: J
authors.initials: J
authors.lastname: Chen
authors.forename: G
authors.initials: G
authors.lastname: Peng
authors.forename: C T
authors.initials: CT
authors.lastname: Chen
authors.forename: L H
authors.initials: LH
authors.lastname: Tjeng
authors.forename: G
authors.initials: G
authors.lastname: Meigs
authors.forename: H J
authors.initials: HJ
authors.lastname: Lin
authors.forename: Z H
authors.initials: ZH
authors.lastname: Zhou
authors.forename: M W
authors.initials: MW
authors.lastname: Adams
mesh_terms: D001419:Bacteria / Q000737:chemistry; D001426:Bacterial Proteins / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002942:Circular Dichroism; D008280:Magnetics; D010084:Oxidation-Reduction; D012416:Rubredoxins / Q000737:chemistry*; D014965:X-Rays
chemical_list: D001426:Bacterial Proteins; D012416:Rubredoxins