Electric field effects in the near-threshold photoionization spectrum of nitric oxide
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Zero-kinetic-energy--photoelectron spectroscopy (ZEKE-PES) and time-of-flight mass spectrometry are used to investigate the near-threshold, two-color photoionization of NO via the [ital A] [sup 2][Sigma][sup +], [ital v]=0 level. Pulsed-field ionization of Rydberg states within 20 cm[sup [minus]1] of the ionization threshold is shown to proceed via a diabatic mechanism. Particular emphasis is given to the effect of predissociation on the signal produced by delayed field ionization. A small ([similar to]3 V/cm) dc electric field is shown to produce a dramatic decrease in the field ionization signal in both the NO[sup +]-ion and ZEKE-electron channels. This decrease is thought to be due to an increase in the predissociation rate caused by the dc electric field. The implications of these experiments for mass-analyzed threshold ionization are discussed.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6496796
- Journal Information:
- Journal of Chemical Physics; (United States), Vol. 98:12; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NITRIC OXIDE
PHOTOIONIZATION
COLOR
DC SYSTEMS
DIABATIC APPROXIMATION
ELECTRIC FIELDS
INHIBITION
KINETIC ENERGY
MASS SPECTROSCOPY
PHOTOELECTRON SPECTROSCOPY
PREDISSOCIATION
PULSES
RYDBERG STATES
THRESHOLD ENERGY
TIME-OF-FLIGHT METHOD
CHALCOGENIDES
DISSOCIATION
ELECTRON SPECTROSCOPY
ENERGY
ENERGY LEVELS
EXCITED STATES
IONIZATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWER SYSTEMS
SPECTROSCOPY
664200* - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)