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A-tilde 2Pi<--X-tilde 2Sigma+ infrared electronic transition of C2Ha)
Five bands of the 2 2+ lowest electronic transition of C2H have been observed in the region 3600–4200 cm−1 in an argon discharge over polyacetylene using color center laser spectroscopy w...
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Electric dipole moments of excited vibrational levels in the X-tilde 1A1 state of formaldehyde by stimulated emission spectroscopy

J. Chem. Phys. 78, 3659 (1983); doi:10.1063/1.445140

Issue Date: 15 March 1983

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Patrick H. Vaccaro, James L. Kinsey, R. W. Field, and Hai-Lung Dai
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
The electric dipole moments of the 44 (E4nu4=4628.4 cm−1), 2242 (E2nu22nu4)=5770 cm−1), and 2144 (E1nu24nu4=6347 cm−1) levels of H2CO are measured as 2.2723(86), 2.3222(47), and 2.2825(33) D, respectively. This first combination of stimulated emission pumping (SEP) with a static electric field demonstrates the possibility of systematically measuring dipole moments for highly excited vibrational levels of polyatomic molecules in their electronic ground states. The present dipole moment measurements and all previous ones involving overtones and combinations of the C–O stretch (nu2) and out-of-plane bend (nu4) are reduced to two types of expansions. The dipole moment µ is expressed both as an expansion in the normal coordinate displacements and as an expansion through squared terms in the v2 and v4 vibrational quantum numbers. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 17 September 1982; accepted 12 October 1982
Permalink: http://link.aip.org/link/?JCPSA6/78/3659/1
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KEYWORDS and PACS

Keywords
PACS
  • 35.20.My
    Experimentally derived information on atoms and molecules; instrumentation and techniques Molecules Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility
  • 31.50.+w
    Electronic structure of atoms and molecules: theory Excited states
  • YEAR: 1983

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (21)
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