title: Measurement of Electron-Ion Relaxation in Warm Dense Copper.
abstract: Experimental investigation of electron-ion coupling and electron heat capacity of copper in warm and dense states are presented. From time-resolved x-ray absorption spectroscopy, the temporal evolution of electron temperature is obtained for non-equilibrium warm dense copper heated by an intense femtosecond laser pulse. Electron heat capacity and electron-ion coupling are inferred from the initial electron temperature and its decrease over 10 ps. Data are compared with various theoretical models.
authors.affiliation: Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 500-712, Korea.|Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, Korea.
authors.forename: B I
authors.initials: BI
authors.lastname: Cho
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
authors.forename: T
authors.initials: T
authors.lastname: Ogitsu
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: K
authors.initials: K
authors.lastname: Engelhorn
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Correa
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Ping
authors.affiliation: Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 500-712, Korea.|Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, Korea.
authors.forename: J W
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 500-712, Korea.|Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, Korea.
authors.forename: L J
authors.initials: LJ
authors.lastname: Bae
authors.affiliation: Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: D
authors.initials: D
authors.lastname: Prendergast
authors.affiliation: Department of Physics, University of California, Berkeley, CA 94720, USA.
authors.forename: R W
authors.initials: RW
authors.lastname: Falcone
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: P A
authors.initials: PA
authors.lastname: Heimann