The vibration-induced dipole moment in the   diad of 13CD4 and 28SiH4

Prinz, H.; Höhe, W.; Kreiner, W. A.; Loëte, M.; Hilico, J. C.; Pierre, G.; Magerl, Gottfried; Schupita, Walter

doi:10.1016/0022-2852(89)90361-5

Cited by 28 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3 summarizes schematically the lowest vibrational levels of methane and the effective dipole moment operators implied for rotational transitions. The µ 4,4 parameter is related to the (µ z ) eff parameter of Mills et al [38] through the relation [39]…”

Section: Theorymentioning

confidence: 99%

The high-resolution far-infrared spectrum of methane at the SOLEIL synchrotron

Boudon¹,

Pirali²,

Roy³

et al. 2010

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

As a tetrahedral molecule, methane has no permanent dipole moment. Its spectrum, however, displays faint absorption lines in the THz region, due to centrifugal distorsion effects. This is important for planetary applications since this region is used to measure methane concentration in some planetary atmospheres, in particular on Titan. Up to now, all measurements relied either on some old low resolution infrared absorption spectra, or on high resolution Stark measurements for low J values only. Even if these results have been reexamined recently [E. H. Wishnow, G. S. Orton, I. Ozier and H. P. Gush, J. Quant. Spectrosc. Radiat. Transfer 103, 102-117 (2007)], it seemed highly desirable to obtain much more precise laboratory data. The high-intensity synchrotron radiation, combined with a 151.75 ± 0.1 m optical path in a White cell and a Bruker IFS 125 HR FTIR spectrometer at the AILES beamline of SOLEIL, enabled us to record this very weak spectrum at high resolution for the first time. Spectra were obtained in the 50-500 cm −1 wavenumber range at 296 K and 9.91, 20, 50 and 100 mbar with a resolution of 0.00074, 0.00134, 0.0034 and 0.0067 cm −1 (FWHM of the sinc function), 6 This paper is dedicated to Dr. Larry Rothman on the occasion of his 70th birthday.

show abstract

Section: Theorymentioning

confidence: 99%

The high-resolution far-infrared spectrum of methane at the SOLEIL synchrotron

Boudon¹,

Pirali²,

Roy³

et al. 2010

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

show abstract

“…Taking into account these selection rules, the distance between the rovibrational energy levels, and the order of magnitude of dipole moment matrix elements, it was shown (24,36) that the Stark effect in a given vibrational level of a tetrahedral molecule for a weak electric field reduces to a 2 ϫ 2 matrix model. For stronger electric fields, this approximation remains valid within each vibrational level.…”

Section: Stark Hamiltonianmentioning

confidence: 98%

“…The operator D-GS is induced by the vibration of the molecule (q 4 mode) and represents the transition moment of the 2 / 4 dyad, i.e., the interaction between the couples of levels (E 1 , E 2 ) and (E 3 , E 4 ). 0 , 44 , 24 , and 0,4 are parameters known from previous works (26,38):…”

Section: Stark Hamiltonianmentioning

confidence: 99%