title: Photofragmentation of the K-shell excited perfluorocyclobutane: anisotropies in the fragments and breakdown pathways.
abstract: Total ion yield spectrum of perfluorocyclobutane (c-C(4)F(8)) has been measured in the C and F K-shell excitation regions. The peak assignments are presented based on angle-resolved photofragment ion mass spectrometry. The peaks at 291.34 and 688.5 eV are found to come from the transitions from the C 1s and the F 1s to the lowest unoccupied b(2)σ(CF)* orbital, respectively. A photoelectron-photoion-photoion coincidence spectrum is acquired at 700.1 eV for clarifying the breakdown pathways of c-C(4)F(8)(2+). Two series of the pathways are identified; fission of F atom(s) followed by charge separation and elimination of CF(2) or CF(3) followed by charge separation.
authors.affiliation: Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan. okadak@sci.hiroshima-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: A
authors.initials: A
authors.lastname: Suemitsu
authors.forename: T
authors.initials: T
authors.lastname: Terashima
authors.forename: Y
authors.initials: Y
authors.lastname: Iwasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Tamenori
authors.forename: I H
authors.initials: IH
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Nagaoka
authors.forename: K
authors.initials: K
authors.lastname: Tabayashi