title: A study of transferability of atomic background on EXAFS spectra of simple gaseous compounds of As.
abstract: From EXAFS spectra of As and As2O3 vapors and arsine gas AsH3 the ab initio calculated structural signal is removed. The remainders comprise small absorption edges due to shake-up channels involving electrons from 3d or 3p subshell. With enhanced resolution, the edges reveal a fine splitting and a varying contribution of resonance channels, due to individual molecular energy-level structure of the samples. On the resolution level appropriate for routine EXAFS analysis the remainders coincide, representing a unique and transferable atomic absorption background for the range of As valence states spanned by the samples.
authors.affiliation: Faculty of Mathematics and Physics, Ljubljana, Slovenia. alojz.f.kodre@ijs.si
authors.forename: A
authors.initials: A
authors.lastname: Kodre
authors.forename: R
authors.initials: R
authors.lastname: Preseren
authors.forename: I
authors.initials: I
authors.lastname: Arcon
authors.forename: J P
authors.initials: JP
authors.lastname: Gomilsek
authors.forename: M
authors.initials: M
authors.lastname: Borowski