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Titolo:
Observation of coriolis coupling between nu(2)+4 nu(4) and 7 nu(4) in acetylene (1)Sigma(+)(g) by stimulated emission pumping spectroscopy
Autore:
Moss, DB; Duan, ZC; Jacobson, MP; OBrien, JP; Field, RW;
Indirizzi:
MIT, Dept Chem, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139MIT, Dept Chem, Cambridge, MA 02139 USA MIT, George R Harrison Spect Lab, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139 R Harrison Spect Lab, Cambridge, MA 02139 USA
Titolo Testata:
JOURNAL OF MOLECULAR SPECTROSCOPY
fascicolo: 2, volume: 199, anno: 2000,
pagine: 265 - 274
SICI:
0022-2852(200002)199:2<265:OOCCBN>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION; CHANNEL 3 REGION; ENERGY REDISTRIBUTION; APPROXIMATE CONSTANTS; EXCITED ACETYLENE; INTERNAL ENERGY; RELAXATION; SPECTRA; DYNAMICS; STATE;
Keywords:
acetylene; Coriolis coupling; IVR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Moss, DB MIT, Dept Chem, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139 T, Dept Chem, Cambridge, MA 02139 USA
Citazione:
D.B. Moss et al., "Observation of coriolis coupling between nu(2)+4 nu(4) and 7 nu(4) in acetylene (1)Sigma(+)(g) by stimulated emission pumping spectroscopy", J MOL SPECT, 199(2), 2000, pp. 265-274

Abstract

Stimulated emission pumping (SEP) spectroscopy has been used to examine a low energy region (E-vib approximate to 4400 cm(-1)) of (X) over tilde(w) Sigma(g)(+) acetylene at higher resolution than was possible in previous dispersed fluorescence studies. The expected bright state, nu(2) + 4 nu(4) is observed to be coupled to the nearly degenerate 7 nu(4), state by a Coriolis mechanism. A least-squares analysis yields values for zero-order vibrational energies, rotational constants, and a Coriolis-coupling coefficient that are all consistent with expectations. Calculated relative intensities of SEP transitions, accounting for interference due to axis-switching effects,are also consistent with observations. Implications of the observed Coriolis resonance with regard to global acetylene vibrational dynamics are also discussed. (C) 2000 Academic Press.

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Documento generato il 11/07/20 alle ore 11:06:21