Abstract
The collisional broadening () and shift () coefficients of more than 100 absorption rovibrational lines of the 1 + 2 and 2 + 3 bands of the water vapor molecule in a H2O-He mixture were measured with the help of a Fourier-transform spectrometer over a large range of helium pressures. The shift coefficients are mainly positive and have an unusual rotational dependence, in contrast to the line center shift induced by other mono-atomic gases. The calculations of coefficients and are performed in the framework of the semi-classical method. The rotational dependence of these shift coefficients is explained by the rotational dependence of the isotropic intermolecular potential. The influence of accidental resonances in the H2O molecule is also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 43-51 |
| Number of pages | 9 |
| Journal | Molecular Physics |
| Volume | 107 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 |
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Keywords
- Accidental resonances
- Line broadening shift coefficients
- Semi-classical impact method
- Water-vapor absorption spectrum
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Biophysics
- Molecular Biology
Cite this
Helium-induced halfwidths and line shifts of water vapor transitions of the v1 + v2 and v2 + v3 bands. / Solodov, A. M.; Starikov, V. I.
In: Molecular Physics, Vol. 107, No. 1, 2009, p. 43-51.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Helium-induced halfwidths and line shifts of water vapor transitions of the v1 + v2 and v2 + v3 bands
AU - Solodov, A. M.
AU - Starikov, V. I.
PY - 2009
Y1 - 2009
N2 - The collisional broadening () and shift () coefficients of more than 100 absorption rovibrational lines of the 1 + 2 and 2 + 3 bands of the water vapor molecule in a H2O-He mixture were measured with the help of a Fourier-transform spectrometer over a large range of helium pressures. The shift coefficients are mainly positive and have an unusual rotational dependence, in contrast to the line center shift induced by other mono-atomic gases. The calculations of coefficients and are performed in the framework of the semi-classical method. The rotational dependence of these shift coefficients is explained by the rotational dependence of the isotropic intermolecular potential. The influence of accidental resonances in the H2O molecule is also discussed.
AB - The collisional broadening () and shift () coefficients of more than 100 absorption rovibrational lines of the 1 + 2 and 2 + 3 bands of the water vapor molecule in a H2O-He mixture were measured with the help of a Fourier-transform spectrometer over a large range of helium pressures. The shift coefficients are mainly positive and have an unusual rotational dependence, in contrast to the line center shift induced by other mono-atomic gases. The calculations of coefficients and are performed in the framework of the semi-classical method. The rotational dependence of these shift coefficients is explained by the rotational dependence of the isotropic intermolecular potential. The influence of accidental resonances in the H2O molecule is also discussed.
KW - Accidental resonances
KW - Line broadening shift coefficients
KW - Semi-classical impact method
KW - Water-vapor absorption spectrum
UR - http://www.scopus.com/inward/record.url?scp=61349166491&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=61349166491&partnerID=8YFLogxK
U2 - 10.1080/00268970802698655
DO - 10.1080/00268970802698655
M3 - Article
VL - 107
SP - 43
EP - 51
JO - Molecular Physics
JF - Molecular Physics
SN - 0026-8976
IS - 1
ER -