title: Local structure of amorphous ice as revealed by O K-edge EXAFS.
abstract: The oxygen K-edge extended X-ray absorption fine structure (EXAFS) spectrum of an ice film prepared by deposition of water vapor on a substrate at 100 K was measured in the surface-sensitive Auger yield mode. Five distinct peaks are revealed in the Fourier transform spectrum of the EXAFS data. The peaks are attributed to O-H bonds (with overlapping contributions from intramolecular covalent and intermolecular hydrogen bonds) as well as to intermolecular O...O scattering paths in the distance range of 1-7 A. The pattern of the longer O...O distances resembles that of a high-pressure crystalline modification of ice (ice II).
authors.affiliation: Angewandte Physikalische Chemie, Universität Heidelberg INF 253, 69120 Heidelberg, Germany. yan.zubavichus@urz.uni-heidelberg.de
authors.forename: Yan
authors.initials: Y
authors.lastname: Zubavichus
authors.forename: Yongjie
authors.initials: Y
authors.lastname: Yang
authors.forename: Michael
authors.initials: M
authors.lastname: Zharnikov
authors.forename: Oliver
authors.initials: O
authors.lastname: Fuchs
authors.forename: Thomas
authors.initials: T
authors.lastname: Schmidt
authors.forename: Clemens
authors.initials: C
authors.lastname: Heske
authors.forename: Eberhard
authors.initials: E
authors.lastname: Umbach
authors.forename: George
authors.initials: G
authors.lastname: Tzvetkov
authors.forename: Falko P
authors.initials: FP
authors.lastname: Netzer
authors.forename: Michael
authors.initials: M
authors.lastname: Grunze