Stimulated emission pumping of intermolecular vibrations in OH--Ar( X sup 2. Pi. )

Journal Article · Mon Jun 01 00:00:00 EDT 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.462342· OSTI ID:7235022

Berry, M T; Loomis, R A; Giancarlo, L C; Lester, M I ^[1]

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1. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323 (United States)

Stimulated emission spectroscopy has been used to access the intermolecular bending and stretching vibrations supported by the OH({ital X} {sup 2}{Pi})+Ar({sup 1}{ital S}{sub 0}) potential-energy surfaces. Manifolds of OH--Ar bending levels, correlating with the {ital j}= (3)/(2) , (5)/(2) , and (7)/(2) rotational levels of OH({sup 2}{Pi}{sub 3/2}), have been observed with zero to three quanta of intermolecular stretch. OH--Ar complexes have also been prepared in intermolecular vibrational levels of the spin--orbit excited state correlating with OH({sup 2}{Pi}{sub 1/2}). The first dissociation limit, producing OH({sup 2}{Pi}{sub 3/2}) {ital v}=0, {ital j}= (3)/(2) +Ar({sup 1}{ital S}{sub 0}) fragments, has been determined to lie between 93 and 103 cm{sup {minus}1} above the zero-point level. Complexes prepared in metastable levels, detected up to 200 cm{sup {minus}1} beyond the first dissociation limit, undergo predissociation by using OH rotational or spin--orbit excitation to break the OH--Ar intermolecular bond.

• OSTI ID: 7235022
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 96:11; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON COMPLEXES
COMPLEXES
COUPLING
DISSOCIATION
EMISSION
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROXYL RADICALS
INTERMEDIATE COUPLING
L-S COUPLING
MATHEMATICAL MANIFOLDS
METASTABLE STATES
OPTICAL PUMPING
POTENTIAL ENERGY
PUMPING
RADICALS
ROTATIONAL STATES
SPECTROSCOPY
STIMULATED EMISSION
VIBRATIONAL STATES