Global Fittings of the Vibrational–Rotational Line Positions of the 16O12C17O and 16O12C18O Isotopic Species of Carbon Dioxide

2001 ◽  
Vol 210 (1) ◽  
pp. 137-145 ◽  
Author(s):  
S.A. Tashkun ◽  
V.I. Perevalov ◽  
J.-L. Teffo
Keyword(s):  
Carbon Dioxide ◽  
Rotational Line ◽  
Isotopic Species ◽  
Line Positions

Line Positions and Absolute Intensities in the Laser Bands of Carbon-12 Oxygen-17 Isotopic Species of Carbon Dioxide

1999 ◽  
Vol 193 (1) ◽  
pp. 15-32 ◽  
Author(s):  
C. Claveau ◽  
J.-L. Teffo ◽  
D. Hurtmans ◽  
A. Valentin ◽  
R.R. Gamache
Keyword(s):  
Carbon Dioxide ◽  
Absolute Intensities ◽  
Isotopic Species ◽  
Line Positions

Global fitting of the vibrational-rotational line positions of the acetylene molecule

2000 ◽  
Author(s):  
Oleg M. Lyulin ◽  
Valery I. Perevalov ◽  
Sergey A. Tashkun ◽  
Jean-Luc Teffo
Keyword(s):  
Rotational Line ◽  
Acetylene Molecule ◽  
Line Positions ◽  
Global Fitting

Born–Oppenheimer breakdown in the ground state of carbon monoxide: A direct reduction of spectroscopic line positions to analytical radial Hamiltonian operators

1992 ◽  
Vol 70 (1) ◽  
pp. 40-54 ◽  
Author(s):  
John A. Coxon ◽  
Photos G. Hajigeorgiou
Keyword(s):  
Carbon Monoxide ◽  
Ground State ◽  
Direct Reduction ◽  
Direct Determination ◽  
Quantum Mechanical ◽  
Rotational Line ◽  
Molecular Constants ◽  
Full Account ◽  
Radial Wave ◽  
Line Positions

A collection of 10 866 of the most precise ground-state (X1Σ+) vibration–rotational and pure rotational line positions of four carbon monoxide isptopomers (12C16O, 12C18O, 13C16O, and 13C18O) is employed simultaneously in a direct determination of the radial Hamiltonian operator in compact analytical form. The 22-parameter isotopically self-consistent operator takes full account of the Born–Oppenheimer breakdown and its quantum-mechanical eigenvalues represent all the available spectroscopic line positions of CO isotopomers to within the experimental uncertainties. Rayleigh–Schrödinger perturbation theory is employed to calculate quantum-mechanical molecular constants of rotation (Bν – Mν) for nine common isotopomeric forms of CO. Together with the quantum-mechanical vibrational eigenvalues these are fully consistent with the exact eigenvalues obtained by direct solution of the radial wave equation. The set of constants is expected to provide an accurate prediction of line positions of CO isotopomers that have not yet been experimentally observed.

Global fittings of the line positions of the rare isotopic species of the nitrous oxide molecule

2006 ◽  
Author(s):  
A. V. Vlasova ◽  
B. V. Perevalov ◽  
S. A. Tashkun ◽  
V. I. Perevalov
Keyword(s):  
Nitrous Oxide ◽  
Oxide Molecule ◽  
Isotopic Species ◽  
Line Positions

16O13C18O: high-resolution absorption spectrum between 4000 and 9500cm−1 and global fitting of vibration–rotational line positions

2003 ◽  
Vol 222 (2) ◽  
pp. 276-283 ◽  
Author(s):  
Y. Ding ◽  
V.I. Perevalov ◽  
S.A. Tashkun ◽  
J.-L. Teffo ◽  
A.-W. Liu ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
High Resolution ◽  
Rotational Line ◽  
Line Positions ◽  
Global Fitting

High-resolution spectroscopy of the (000)–(000) band of the CaOD radical

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1200-1205 ◽  
Author(s):  
Mingguang Li ◽  
John A. Coxon
Keyword(s):  
High Resolution ◽  
Gas Phase ◽  
Ground State ◽  
Measurement Accuracy ◽  
Isotope Effects ◽  
Spin Rotation ◽  
High Resolution Spectroscopy ◽  
Rotational Line ◽  
Measured Line ◽  
Line Positions

The [Formula: see text] (000)–(000) band of the gas-phase CaOD radical has been rotationally analyzed using high-resolution laser spectroscopy. The technique of intermodulated fluorescence was employed to resolve the small spin-rotation splittings in the ground state. The measurement accuracy of the rotational line positions was 0.003 cm−1. The measured line positions have been employed in a least-squares estimation of the molecular constrants for both electronic states. Isotope relations between the constants of CaOH and CaOD are examined, and the constants AD and γ for the Ã2Π(000) level were separated using isotope effects.

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