title: Two-photon spectroscopy of core excitons in barium fluoride using synchrotron radiation and laser light.
abstract: We have conducted two-photon spectroscopy of core excitons in BaF(2). Synchrotron radiation and laser light were used for 5p core-electron excitation and Auger-free luminescence was detected as the signal. Two-photon excitation enables access to f and p orbitals that cannot be reached by one-photon excitation of electrons in p orbitals. It has been found that the spin-orbit splittings of 4f and 6p states of the Ba ion in BaF(2) are 0.7 +/- 0.1 and 1.4 +/- 0.1 eV, respectively.
authors.affiliation: Department of Physics, Osaka Dental University, 8-1 Kuzuha-hanazono, Hirakata 573-1121, Japan. toru-t@cc.osaka-dent.ac.jp
authors.forename: Toru
authors.initials: T
authors.lastname: Tsujibayashi
authors.forename: Minoru
authors.initials: M
authors.lastname: Itoh
authors.forename: Junpei
authors.initials: J
authors.lastname: Azuma
authors.forename: Masayuki
authors.initials: M
authors.lastname: Watanabe
authors.forename: Osamu
authors.initials: O
authors.lastname: Arimoto
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nakanishi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Itoh
authors.forename: Masao
authors.initials: M
authors.lastname: Kamada