Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of diatomic molecules

Journal Article · Tue Oct 01 00:00:00 EDT 1991 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.461793· OSTI ID:5180291

Wang, K; McKoy, V ^[1]

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

In this paper we extend a previous formulation of molecular resonance enhanced multiphoton ionization (REMPI) photoelectron spectra to explicitly include multiplet-specific final state wave functions and intermediate coupling schemes. The results of this formulation should be well suited and helpful in quantitative theoretical studies of rotationally resolved REMPI spectra in many diatomic molecules of interest. As an example, we use this formulation to study the rotational branching ratios and photoelectron angular distributions for (3+1) REMPI of NH via the 3 {sup 3}{Pi} Rydberg resonant state. The predicted anomalous rotational distributions are interpreted as arising from a Cooper minimum in the {ital l}=2 component of the {ital k}{pi} photoionization channel. A number of other results are obtained and discussed.

• DOE Contract Number: FG03-87ER60513
• OSTI ID: 5180291
• Journal Information: Journal of Chemical Physics; (United States), Vol. 95:7; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
NITROGEN HYDRIDES
PHOTOIONIZATION
ROTATIONAL STATES
ANGULAR DISTRIBUTION
BRANCHING RATIO
MOLECULES
MULTI-PHOTON PROCESSES
PHOTOELECTRON SPECTROSCOPY
RYDBERG STATES
WAVE FUNCTIONS
DISTRIBUTION
ELECTRON SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
FUNCTIONS
HYDRIDES
HYDROGEN COMPOUNDS
IONIZATION
NITROGEN COMPOUNDS
SPECTROSCOPY
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory