Abstract
The peculiarities of broadening of spectral lines of symmetric top molecules that are related to the double degeneracy of JK levels at K ≠ 0 are considered. It is shown that, irrespective of the potential barrier height for the inversion vibration, transitions between such levels should be considered as doublets whose components are coupled with each other by the collision-induced spectral exchange. The shape of the doublet is described by the well-known Ben-Reuven formula, and, in this case of molecules with a high potential barrier for the inversion vibration, is a dispersion contour with a half-width equal to the difference between the halfwidth of the component of the doublet and the cross-relaxation parameter.
| Original language | English |
|---|---|
| Pages (from-to) | 851-858 |
| Number of pages | 8 |
| Journal | Optics and Spectroscopy (English translation of Optika i Spektroskopiya) |
| Volume | 105 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Dec 2008 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
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Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Collisional interference of lines in the spectra of symmetric top molecules
T2 - I. A theory of relaxation parameters of the shape of the spectrum in the impact approximation
AU - Cherkasov, M. R.
PY - 2008/12
Y1 - 2008/12
N2 - The peculiarities of broadening of spectral lines of symmetric top molecules that are related to the double degeneracy of JK levels at K ≠ 0 are considered. It is shown that, irrespective of the potential barrier height for the inversion vibration, transitions between such levels should be considered as doublets whose components are coupled with each other by the collision-induced spectral exchange. The shape of the doublet is described by the well-known Ben-Reuven formula, and, in this case of molecules with a high potential barrier for the inversion vibration, is a dispersion contour with a half-width equal to the difference between the halfwidth of the component of the doublet and the cross-relaxation parameter.
AB - The peculiarities of broadening of spectral lines of symmetric top molecules that are related to the double degeneracy of JK levels at K ≠ 0 are considered. It is shown that, irrespective of the potential barrier height for the inversion vibration, transitions between such levels should be considered as doublets whose components are coupled with each other by the collision-induced spectral exchange. The shape of the doublet is described by the well-known Ben-Reuven formula, and, in this case of molecules with a high potential barrier for the inversion vibration, is a dispersion contour with a half-width equal to the difference between the halfwidth of the component of the doublet and the cross-relaxation parameter.
UR - http://www.scopus.com/inward/record.url?scp=57849135712&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57849135712&partnerID=8YFLogxK
U2 - 10.1134/S0030400X08120072
DO - 10.1134/S0030400X08120072
M3 - Article
VL - 105
SP - 851
EP - 858
JO - Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
JF - Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
SN - 0030-400X
IS - 6
ER -