title: Observations of plasmons in warm dense matter.
abstract: We present the first collective x-ray scattering measurements of plasmons in solid-density plasmas. The forward scattering spectra of a laser-produced narrow-band x-ray line from isochorically heated beryllium show that the plasmon frequency is a sensitive measure of the electron density. Dynamic structure calculations that include collisions and detailed balance match the measured plasmon spectrum indicating that this technique will enable new applications to determine the equation of state and compressibility of dense matter.
authors.affiliation: L-399, Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94551, USA.
authors.forename: S H
authors.initials: SH
authors.lastname: Glenzer
authors.forename: O L
authors.initials: OL
authors.lastname: Landen
authors.forename: P
authors.initials: P
authors.lastname: Neumayer
authors.forename: R W
authors.initials: RW
authors.lastname: Lee
authors.forename: K
authors.initials: K
authors.lastname: Widmann
authors.forename: S W
authors.initials: SW
authors.lastname: Pollaine
authors.forename: R J
authors.initials: RJ
authors.lastname: Wallace
authors.forename: G
authors.initials: G
authors.lastname: Gregori
authors.forename: A
authors.initials: A
authors.lastname: Höll
authors.forename: T
authors.initials: T
authors.lastname: Bornath
authors.forename: R
authors.initials: R
authors.lastname: Thiele
authors.forename: V
authors.initials: V
authors.lastname: Schwarz
authors.forename: W-D
authors.initials: WD
authors.lastname: Kraeft
authors.forename: R
authors.initials: R
authors.lastname: Redmer