Diode laser measurements of intensities, N 2-broadening, and self-broadening coefficients of lines of the ν2 band of 14N 16O 2
Abstract
A diode laser spectrometer (resolution 0.0013 cm -1) was used to record, in the 12-μm region, high-quality spectra of the ν2 band of NO 2. Using these spectra, it was possible to obtain the N 2-broadening coefficients and an average self-broadening coefficient from measurements made for seven lines of this band. In addition, 30 single spin-component line intensities were measured. From them, through a least-squares fit, the purely vibrational transition moment of the ν2 band, as well as two correcting rotational terms involved in the expansion of the transition moment operator, were obtained. These results led to the determination of the dipole moment derivative {∂μ x}/{∂q 2} = -0.0604 1 ± 0.0037 D. It was also demonstrated that there is good consistency between the correcting terms deduced from the observed intensities and their theoretical estimates. Finally, a complete spectrum of the ν2 band of NO 2 was computed, providing a total band intensity Sv( ν2) = 0.542 × 10 -18cm -1/molecule cm -2 at 296 K.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- August 1981
- DOI:
- 10.1016/0022-2852(81)90176-4
- Bibcode:
- 1981JMoSp..88..251M