Broad vibrational overtone linewidths in the 7. nu. sub OH band of rotationally selected NH sub 2 OH

Journal Article · Fri Dec 14 23:00:00 EST 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.459210· OSTI ID:6046133

Luo, X; Fleming, P R; Seckel, T A; Rizzo, T R ^[1]

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1. Department of Chemistry, University of Rochester, Rochester, NY 14627 (USA)

Infrared--optical double-resonance spectroscopy of the 7{nu}{sub OH} vibrational overtone level of NH{sub 2}OH reveals 14 cm{sup {minus}1} wide spectral features. The product state distribution of the OH fragment subsequent to overtone excitation indicates that the 7{nu}{sub OH} level of NH{sub 2}OH is {approximately}128 cm{sup {minus}1} above the N--O bond dissociation energy. Comparison to HOOH overtone spectra at a similar excess energy suggests that the broad NH{sub 2}OH linewidths result from vibrational state mixing at the 7{nu}{sub OH} level and not from inhomogeneous structure or lifetime broadening of the dissociating molecules. The observation of 14 cm{sup {minus}1} overtone linewidths for a molecule the size of NH{sub 2}OH suggests that the broad vibrational overtone transition linewidths in larger polyatomics may contain a substantial homogeneous component.

• OSTI ID: 6046133
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 93:12; 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
AMINES
DOUBLE RESONANCE METHODS
ENERGY LEVELS
EXCITED STATES
HARMONICS
HYDROXYLAMINE
INFRARED SPECTRA
LINE WIDTHS
ORGANIC COMPOUNDS
OSCILLATIONS
ROTATIONAL STATES
SPECTRA
VIBRATIONAL STATES