Effects of Cooper minima in resonance enhanced multiphoton ionization-photoelectron spectroscopy of NO via the D sup 2. Sigma. sup + and C sup 2. Pi. Rydberg states

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.461542· OSTI ID:5180144

Wang, K; Stephens, J A; McKoy, V ^[1]

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1. Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California (USA)

Cooper minima are predicted to occur in the 3{ital p}{sigma}{r arrow}{ital k}{sigma}({ital l}=2) and 3{ital p}{sigma}{r arrow}{ital k}{pi}({ital l}=2) channels in the resonance enhanced multiphoton ionization of NO via the {ital D} {sup 2}{Sigma}{sup +}(3{ital p}{sigma}) Rydberg state. The low energy {ital k}{sigma}({ital l}=2) Cooper minimum leads to the observed {Delta}{ital N}={ital N}{sup +}{minus}{ital N}{prime}=0 photoelectron peak, in addition to the {Delta}{ital N}={plus minus}1, {plus minus}3 peaks seen in the rotational spectra. The Cooper minima are accompanied by significant {ital l} mixing in the continuum due to the nonspherical molecular potential and result in a strong dependence of rotational branching ratios and angular distributions on photoelectron kinetic energy. A Cooper minimum is also predicted in the 3{ital p}{pi}{r arrow}{ital k}{delta}({ital l}=2) channel for photoionization of the {ital C} {sup 2}{Pi}(3{ital p}{pi}) Rydberg state. The effect of this Cooper minimum on photoelectron spectra and photoelectron angular distributions is also investigated.

• DOE Contract Number: FG03-87ER60513
• OSTI ID: 5180144
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 95:9; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
AUGMENTATION
CHALCOGENIDES
CHARGED PARTICLES
DISTRIBUTION
ELECTRON SPECTROSCOPY
ENERGY
ENERGY LEVELS
EXCITED STATES
IONIZATION
IONS
KINETIC ENERGY
MOLECULAR IONS
MULTI-PHOTON PROCESSES
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RESONANCE
ROTATIONAL STATES
RYDBERG STATES
SPECTROSCOPY