High-resolution measurements and analysis of 14 N 16 O 2 in the (001)-(000) and (011)-(010) bands

High-resolution spectra of NO2 were recorded with a Fourier-transform spectrometer, covering transitions in the (001)–(000) and (011)–(010) bands from 1540 to 1662 cm−1. The measured line frequencies were used with additional data taken from studies at microwave and far-IR frequencies in an analysis to obtain spin–rotation constants and rotational energies of levels in the (001) and (011) states. Line strengths of these two bands were also measured and analyzed in this study. The analyses included spin–rotation levels of the (001) state for Ka up to and including 13 and N to 73 and those of the (001) state for Ka up to and including 7 and N to 55. The study included observed and enhanced Ka = 5 → 6 transitions in the (020)–(000) band that interact, by means of a Coriolis-type interaction, with Ka = 5 transitions in the (011)–(000) band. Also observed and analyzed were the results of spin–rotation resonance interactions between two levels of the same state. These perturbations affected one or more levels of a given Ka and state and were observed for Ka = 0 with Ka = 2 and Ka = 1 with Ka = 3 for the (001) and (000) states and for Ka = 0 with Ka = 2 for the (011) and (001) states.

[1]  V. Malathy Devi,et al.  Diode laser spectra of the ν2 band of 14N16O2: The (010) state of NO2 , 1980 .

[2]  Shuji Saito,et al.  Microwave spectrum of nitrogen dioxide in excited vibrational states—Equilibrium structure , 1983 .

[3]  A. Weber,et al.  The pure rotational Raman spectra of 1,4-cyclohexadiene and 1,3,5-cycloheptatriene☆ , 1964 .

[4]  A. Fried,et al.  Spin splittings in the ν3 band of NO2 , 1987 .

[5]  J. Flaud,et al.  The ν2 band of 14N16O2—Spin-rotation perturbations in the (010) state , 1988 .

[6]  R. Curl,et al.  A determination of the spin–rotation parameters for NO2 in the X̃ 2A1 state by microwave–optical double resonance , 1981 .

[7]  W. J. Lafferty,et al.  Analysis of the ν3 band of 14N16O2 , 1974 .

[8]  R. Curl,et al.  Microwave spectrum of NO2 in the v2 = 1 state , 1976 .

[9]  R. Toth,et al.  Line positions and strengths of CO2 in the 1200-1430-cm;-1 region. , 1985, Applied optics.

[10]  A. R. Hoy.  High order Coriolis interactions in NO2 , 1981 .

[11]  Frank C. De Lucia,et al.  The millimeter and submillimeter spectrum of NO2: A study of electronic effects in a nonsinglet light asymmetric rotor , 1982 .

[12]  W. J. Lafferty,et al.  High-resolution infrared spectrum of the ?3 and ?2 + ?3 - ?2 bands of 14N16O2 , 1976 .

[13]  M. Allegrini,et al.  Spin–rotation and hyperfine parameters for the (001) excited vibrational state of NO2 from infrared–radiofrequency double resonance , 1980 .

[14]  L. Brown,et al.  Computer Measurement of Line Strengths with Application to the Methane Spectrum , 1983 .

[15]  A. Guttman.  Absolute infrared intensity measurements on nitrogen dioxide and dinitrogen tetroxide , 1962 .

[16]  Robert A. Toth,et al.  nu-2 band of H2 O-16 - Line strengths and transition frequencies , 1991 .

[17]  W. J. Lafferty,et al.  High-resolution infrared spectrum of the ?2 + ?3 band of 14N16O2 , 1975 .

[18]  Jean-Marie Flaud,et al.  Improved line parameters for the ν3 and ν2 + ν3 − ν2 bands of 14N16O2 , 1982 .

[19]  T. Kyle,et al.  Statistical Band Model Parameters and Integrated Intensities for the 5.9-mu, 7.5-mu, and 11.3-mu Bands of HNO(3) Vapor. , 1971, Applied optics.

[20]  W. J. Lafferty,et al.  The high-resolution spectrum of the ν1 + ν2 band of NO2: A spin-induced perturbation in the ground state , 1987 .

[21]  T. C. James,et al.  Spin—Orbit Coupling Constant of Nitric Oxide. Determination from Fundamental and Satellite Band Origins , 1964 .

[22]  K. Hakuta,et al.  Infrared laser magnetic resonance (LMR) spectroscopy of NO2 (ν2) with a CO2 laser , 1982 .

[23]  Bruno Carli,et al.  The far infrared spectrum of 14N16O2 , 1988 .

[24]  Robert A. Toth,et al.  N2O vibration-rotation parameters derived from measurements in the 900-1090- and 1580-2380/cm regions , 1987 .

[25]  V. Malathy Devi,et al.  Tunable diode laser spectroscopy of NO2 at 6.2 μm , 1982 .