Rotationally resolved photoionization with coherent VUV radiation

Conference · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:10172085

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, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10172085
• Report Number(s): BNL--47814; CONF-920735--3; ON: DE92019257
• Country of Publication: United States
• Language: English

Related Subjects

664200
664400
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
EXPERIMENTALLY DERIVED INFORMATION ON ATOMIC AND MOLECULAR PROPERTIES
HYDROCHLORIC ACID
MOLECULES
NITROGEN OXIDES
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
ROTATIONAL STATES
SPECTRA OF ATOMS AND MOLECULES AND THEIR INTERACTIONS WITH PHOTONS
ULTRAVIOLET RADIATION
WATER