Refined investigation of the overtone spectrum of nitrous oxide

Abstract Following our previous work [A. Campargue, D. Permogorov, M. Bach, M. Abbouti Temsamani, J. Vander Auwera, M. Herman, and M. Fujii, J. Chem. Phys. 103, 5931–5938 (1995)], we reinvestigated the overtone spectrum of nitrous oxide ( 14 N 2 16 O) using intracavity laser absorption spectroscopy, observing seven new bands in the spectral range 10 650–12 200 cm −1 and improving the signal-to-noise ratio in two others previously reported using Fourier transform spectroscopy. The earlier FT line positions, in the range 6500–11 000 cm −1 , have been calibrated using the 3–0 vibration–rotation line wavenumbers in 12 C 16 O as references. A previously unreported hot band is spotted on the FT spectrum, at 7229 cm −1 . Vibration–rotation parameters are provided for all newly analyzed bands and significantly improved for most previously reported FT bands by accounting for more lines in the fitting procedure than earlier. All bands are vibrationally assigned in agreement with theoretical predictions. A table listing all levels above 6500 cm −1 reported in the literature is provided.

[1]  Ohashi,et al.  Newly Observed Vibrotational Bands of N(2)O in 1.3-µm Region. , 1999, Journal of molecular spectroscopy.

[2]  Richard N. Zare,et al.  The labeling of parity doublet levels in linear molecules , 1975 .

[3]  V. Perevalov,et al.  Fitting of Line Intensities Using the Effective Operator Approach: The 4 μm Region of14N216O , 1996 .

[4]  V. I. Perevalov,et al.  Effective Dipole Moment and Band Intensities of Nitrous Oxide , 1995 .

[5]  Y Awaji,et al.  Optical frequency measurement of the H(12)C(14)N Lamb-dip-stabilized 1.5-microm diode laser. , 1995, Optics letters.

[6]  Daniele Romanini,et al.  Diode laser cavity ring down spectroscopy , 1997 .

[7]  Masaaki Fujii,et al.  Overtone spectroscopy in nitrous oxide , 1995 .

[8]  J. Wells,et al.  Heterodyne frequency measurements on N2O near 1060 cm−1 , 1987 .

[9]  J. Wells,et al.  Heterodyne measurements on N2O near 1635 cm−1 , 1989 .

[10]  L. Sinitsa.  High sensitive laser spectroscopy of highly excited molecular states , 1992 .

[11]  G. Herzberg,et al.  Rotation‐Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths VI. The Spectrum of Nitrous Oxide (N2O) below 1.2μ , 1950 .

[12]  Guelachvili,et al.  Absolute Wavenumbers and Self-Induced Pressure Lineshift Coefficients for the 3-0 Vibration-Rotation Band of 12C16O , 1997, Journal of molecular spectroscopy.

[13]  G. Guelachvili,et al.  Vibration-rotation bands of 14N216O: 1.2 micron-3.3 iicron region , 1974 .

[14]  G. Guelachvili,et al.  The absorption spectrum of C2H2 around ν1 + ν3: energy standards in the 1.5 μm region and vibrational clustering , 1994 .

[15]  A. Campargue,et al.  Intensity measurements of the near-infrared and visible overtone bands of nitrous oxide , 1995 .

[16]  Toth.  Line Positions and Strengths of N(2)O between 3515 and 7800 cm(-1). , 1999, Journal of molecular spectroscopy.

[17]  Laurence S. Rothman,et al.  Reprint of: The HITRAN molecular spectroscopic database and HAWKS (HITRAN Atmospheric Workstation): 1996 edition , 1998 .

[18]  V. Perevalov,et al.  Reduced Effective Hamiltonian for a Global Treatment of Rovibrational Energy Levels of Nitrous Oxide , 1994 .

[19]  A. Bastida,et al.  Determination of highly excited rovibrational states for N2O using generalized internal coordinates , 1999 .

[20]  A. Campargue.  The near-infrared absorption spectrum of nitrous oxide: analysis of the 5ν3andν1 + 5ν3 clusters , 1996 .

[21]  F. Stoeckel,et al.  Intracavity laser absorption spectroscopy near 9400 cm−1 with a Nd:glass laser: application to , 1998 .

[22]  Jean Vander Auwera,et al.  Global and accurate vibration Hamiltonians from high resolution molecular spectroscopy , 1999 .

[23]  Michael Hippler,et al.  High-resolution cavity ring-down absorption spectroscopy of nitrous oxide and chloroform using a near-infrared cw diode laser , 1998 .