Strong asymmetry induced [Delta][ital K][sub [ital a]]=3 transitions in the CH[sub 2] [ital [tilde b]] [sup 1][ital B][sub 1][r arrow][ital [tilde a]] [sup 1][ital A][sub 1] spectrum: A study by Fourier transform emission spectroscopy

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.463209· OSTI ID:7011908

Hartland, G V; Xie, W; Qin, D; Dai, H ^[1]

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

Dispersed fluorescence spectra of the CH[sub 2][ital [tilde b]] [sup 1][ital B][sub 1][r arrow][ital [tilde a]] [sup 1][ital A][sub 1[prime]]2[sub 1][sup 16] band were recorded by Fourier transform emission spectroscopy for a series of rotational levels in the [ital [tilde b]][sup 1] [ital B][sub 1] (0,16[sup 0],0) state. Strong [Delta][ital K][sub [ital a]]=3 transitions were observed with their intensity increasing as [ital J] increases in the [ital [tilde a]] [sup 1][ital A][sub 1] (0,1,0) state. The observed intensities could be well reproduced by a calculation based on a rigid asymmetric rotor Hamiltonian, in which CH[sub 2] was assumed to be linear in the [ital [tilde b]] [sup 1][ital B][sub 1] state and bent in the [ital [tilde a]][sup 1][ital A][sub 1] state. The calculation shows that the intensity of the [Delta][ital K][sub [ital a]]=3 transitions arises from the asymmetry of the [ital [tilde a]] [sup 1][ital A][sub 1] state.

• DOE Contract Number: FG02-86ER13484
• OSTI ID: 7011908
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 97:9; ISSN JCPSA6; 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
ASYMMETRY
CHEMICAL REACTIONS
DECOMPOSITION
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUORESCENCE
KETENES
LUMINESCENCE
METHYLENE RADICALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RESOLUTION
ROTATIONAL STATES
SPECTRA
TIME RESOLUTION
TIMING PROPERTIES