Rotationally resolved photoionization with coherent VUV radiation

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:7105550

Wiedmann, R T; Tonkyn, R G; White, M G

Pulsed field ionization (PFI) has been used in conjunction with coherent VUV radiation to investigate the rotational state distributions of molecular cations following single photon ionization. The rotational state distributions for several linear cations (O{sub 2}, NO, OH(OD), HCl and N{sub 2}0) can be interpreted predominately on the basis of the near-threshold, one-electron photoionization dynamics; however, field-induced autoionization is often the dominate ionization pathway for rotational branches involving negative changes in core angular momentum. For photoionization of the H{sub 2}X (X = 0, S) non-linear triatomic molecules, transitions between asymmetric top levels involving the rotational angular momentum projections, K{sub a} and K{sub c} permit resolution of the photoelectron continua according to symmetry. The observed spectra clearly demonstrate the importance of the non-spherical nature of the molecular ion potential which leads to photoelectron final states which are unexpected from atomic-like analogies.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7105550
• Report Number(s): BNL-47814; CONF-920735-3; ON: DE92019257
• Resource Relation: Conference: 10. international conference on vacuum ultraviolet radiation physics, Paris (France), 27-31 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
MOLECULES
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
AUTOIONIZATION
HYDROCHLORIC ACID
NITROGEN OXIDES
OXYGEN
ROTATIONAL STATES
ULTRAVIOLET RADIATION
WATER
CHALCOGENIDES
CHLORINE COMPOUNDS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONIZATION
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SPECTROSCOPY
664400* - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)
664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)