title: Transient X-ray fragmentation: probing a prototypical photoinduced ring opening.
abstract: We report the first study of UV-induced photoisomerization probed via core ionization by an x-ray laser. We investigated x-ray ionization and fragmentation of the cyclohexadiene-hexatriene system at 850 eV during the ring opening. We find that the ion-fragmentation patterns evolve over a picosecond, reflecting a change in the state of excitation and the molecular geometry: the average kinetic energy per ion fragment and H(+)-ion count increase as the ring opens and the molecule elongates. We discuss new opportunities for molecular photophysics created by optical pump x-ray probe experiments.
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA. petrovic@stanford.edu
authors.forename: Vladimir S
authors.initials: VS
authors.lastname: Petrović
authors.forename: Marco
authors.initials: M
authors.lastname: Siano
authors.forename: James L
authors.initials: JL
authors.lastname: White
authors.forename: Nora
authors.initials: N
authors.lastname: Berrah
authors.forename: Christoph
authors.initials: C
authors.lastname: Bostedt
authors.forename: John D
authors.initials: JD
authors.lastname: Bozek
authors.forename: Douglas
authors.initials: D
authors.lastname: Broege
authors.forename: Max
authors.initials: M
authors.lastname: Chalfin
authors.forename: Ryan N
authors.initials: RN
authors.lastname: Coffee
authors.forename: James
authors.initials: J
authors.lastname: Cryan
authors.forename: Li
authors.initials: L
authors.lastname: Fang
authors.forename: Joseph P
authors.initials: JP
authors.lastname: Farrell
authors.forename: Leszek J
authors.initials: LJ
authors.lastname: Frasinski
authors.forename: James M
authors.initials: JM
authors.lastname: Glownia
authors.forename: Markus
authors.initials: M
authors.lastname: Gühr
authors.forename: Matthias
authors.initials: M
authors.lastname: Hoener
authors.forename: David M P
authors.initials: DM
authors.lastname: Holland
authors.forename: Jaehee
authors.initials: J
authors.lastname: Kim
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Marangos
authors.forename: Todd
authors.initials: T
authors.lastname: Martinez
authors.forename: Brian K
authors.initials: BK
authors.lastname: McFarland
authors.forename: Russell S
authors.initials: RS
authors.lastname: Minns
authors.forename: Shungo
authors.initials: S
authors.lastname: Miyabe
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schorb
authors.forename: Roseanne J
authors.initials: RJ
authors.lastname: Sension
authors.forename: Limor S
authors.initials: LS
authors.lastname: Spector
authors.forename: Richard
authors.initials: R
authors.lastname: Squibb
authors.forename: Hongli
authors.initials: H
authors.lastname: Tao
authors.forename: Jonathan G
authors.initials: JG
authors.lastname: Underwood
authors.forename: Philip H
authors.initials: PH
authors.lastname: Bucksbaum
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D003500:Cyclization / Q000528:radiation effects*; D053138:Cyclohexenes / Q000737:chemistry*; D055668:Photochemical Processes; D011090:Polyenes / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics; D014965:X-Rays
chemical_list: D000475:Alkenes; D053138:Cyclohexenes; D011090:Polyenes; C048401:1,4-cyclohexadiene; C117224:1-hexene