title: Laser-driven hard-x-ray generation based on ultrafast selected energy X-ray absorption spectroscopy measurements of Ni compounds.
abstract: Three Ni compounds were studied by ultrafast selected energy x-ray absorption spectroscopy using a laser-driven electron x-ray source with a tungsten target. The measured K edges of these Ni compounds using this self-referencing method were made identical to those measured with synchrotron x-ray sources. This enabled us to determine the absolute peak positions of tungsten Lalpha(1) and Lalpha(2) emitted from this source to be within 1 eV of those from the neutral tungsten atoms, which strongly suggested that the x rays were emitted from high energy electrons interacting with tungsten atoms in the solid target. This is the best evidence to date that directly supports the cold atom x-ray generation theory.
authors.affiliation: Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA.
authors.forename: Fang
authors.initials: F
authors.lastname: Shan
authors.forename: Josh D
authors.initials: JD
authors.lastname: Carter
authors.forename: Vicky
authors.initials: V
authors.lastname: Ng
authors.forename: Ting
authors.initials: T
authors.lastname: Guo