title: Strong phonon replicas in be 1s photoemission spectra.
abstract: The Be 1s core level photoemission line from metallic Be is shown to contain unexpected internal fine structure. We argue that this fine structure is caused by intrinsic excitation of a narrow band of optical phonons in the 1s photoemission process. The general importance of the present results for high resolution core level photoemission investigations of metals is pointed out.
authors.affiliation: Department of Synchrotron Radiation Research, Institute of Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden. Jesper.Andersen@sljus.lu.se
authors.forename: J N
authors.initials: JN
authors.lastname: Andersen
authors.forename: T
authors.initials: T
authors.lastname: Balasubramanian
authors.forename: C O
authors.initials: CO
authors.lastname: Almbladh
authors.forename: L I
authors.initials: LI
authors.lastname: Johansson
authors.forename: R
authors.initials: R
authors.lastname: Nyholm