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

Journal Article · Tue Oct 01 04:00:00 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), Journal Name: Journal of Chemical Physics; (United States) Vol. 95:7; 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
BRANCHING RATIO
DISTRIBUTION
ELECTRON SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
FUNCTIONS
HYDRIDES
HYDROGEN COMPOUNDS
IONIZATION
MOLECULES
MULTI-PHOTON PROCESSES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
ROTATIONAL STATES
RYDBERG STATES
SPECTROSCOPY
WAVE FUNCTIONS