title: Atomic quadrupolar photoemission asymmetry parameters from a solid state measurement
abstract: A method for measuring the asymmetry parameter gamma arising from dipole-quadrupole interference in core-level photoemission is proposed which is based on condensed thin films and exploits the influence of this asymmetry in photoemission monitoring of x-ray standing wave field absorption. The high density of material in this method offers some advantages over a conventional gas-phase measurement. Results are presented for C, O, and F 1s photoemission at photon energies around 3 keV. The combined nondipole asymmetry factor (delta+gamma/3) for non- s-states can be determined in a similar way.
authors.affiliation: Physics Department, University of Warwick, Coventry CV4 7AL, United Kingdom.
authors.initials: GJ
authors.lastname: Jackson
authors.initials: BC
authors.lastname: Cowie
authors.initials: DP
authors.lastname: Woodruff
authors.initials: RG
authors.lastname: Jones
authors.initials: MS
authors.lastname: Kariapper
authors.initials: C
authors.lastname: Fisher
authors.initials: AS
authors.lastname: Chan
authors.initials: M
authors.lastname: Butterfield