Abstract
The relaxation parameters of the lines of the P, Q, and R branches of the ν1 ammonia ν1 band are calculated in the case of self-broadening. In the case of doublets, the effects of collisional interference of the doublet components have been taken into account. It is shown that the cross-relaxation parameters of the components can reach ~60% of the values of the self-broadening coefficients, which gives rise to the narrowing of the components and indicates that the isolated line approximation is inapplicable. Comparison with experimental data is made. Good agreement for self-broadening coefficients is obtained. In the case of the self-shift coefficients, discrepancies are considerable in both magnitude and sign, and it is impossible to elucidate their reasons without invoking additional experimental data.
| Original language | English |
|---|---|
| Pages (from-to) | 859-871 |
| Number of pages | 13 |
| Journal | Optics and Spectroscopy (English translation of Optika i Spektroskopiya) |
| Volume | 122 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2017 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
Cite this
Broadening and collisional interference of lines in the IR spectra of ammonia : Self-broadening in the ν1 band. / Cherkasov, M. R.
In: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Vol. 122, No. 6, 01.06.2017, p. 859-871.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Broadening and collisional interference of lines in the IR spectra of ammonia
T2 - Self-broadening in the ν1 band
AU - Cherkasov, M. R.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - The relaxation parameters of the lines of the P, Q, and R branches of the ν1 ammonia ν1 band are calculated in the case of self-broadening. In the case of doublets, the effects of collisional interference of the doublet components have been taken into account. It is shown that the cross-relaxation parameters of the components can reach ~60% of the values of the self-broadening coefficients, which gives rise to the narrowing of the components and indicates that the isolated line approximation is inapplicable. Comparison with experimental data is made. Good agreement for self-broadening coefficients is obtained. In the case of the self-shift coefficients, discrepancies are considerable in both magnitude and sign, and it is impossible to elucidate their reasons without invoking additional experimental data.
AB - The relaxation parameters of the lines of the P, Q, and R branches of the ν1 ammonia ν1 band are calculated in the case of self-broadening. In the case of doublets, the effects of collisional interference of the doublet components have been taken into account. It is shown that the cross-relaxation parameters of the components can reach ~60% of the values of the self-broadening coefficients, which gives rise to the narrowing of the components and indicates that the isolated line approximation is inapplicable. Comparison with experimental data is made. Good agreement for self-broadening coefficients is obtained. In the case of the self-shift coefficients, discrepancies are considerable in both magnitude and sign, and it is impossible to elucidate their reasons without invoking additional experimental data.
UR - http://www.scopus.com/inward/record.url?scp=85021224745&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021224745&partnerID=8YFLogxK
U2 - 10.1134/S0030400X17060054
DO - 10.1134/S0030400X17060054
M3 - Article
VL - 122
SP - 859
EP - 871
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 -