title: A pressure cell for nonresonant inelastic x-ray scattering studies of gas phases.
abstract: We report the design and performance of a gas-phase sample cell for measurements of momentum transfer (q) dependent nonresonant inelastic x-ray scattering (NRIXS). NRIXS measurements from He gas at 2 MPa (20 bars) readily demonstrate dipole-allowed and dipole-forbidden final states for two-electron excitations. Direct comparison of gas-phase NRIXS measurements with the corresponding nonresonant electron energy loss spectroscopy results (EELS) will be a valuable method for characterizing systematic errors in either technique for studies that require absolute normalization of the double differential cross section.
authors.affiliation: Physics Department, University of Washington, Seattle, Washington 98195, USA.
authors.forename: M
authors.initials: M
authors.lastname: Minzer
authors.forename: J A
authors.initials: JA
authors.lastname: Bradley
authors.forename: R
authors.initials: R
authors.lastname: Musgrave
authors.forename: G T
authors.initials: GT
authors.lastname: Seidler
authors.forename: A
authors.initials: A
authors.lastname: Skilton