Showing papers by "Cristina Puzzarini published in 2002"
TL;DR: In this article, the pure rotational spectrum of C17O has been observed in the millimeter and submillimeter-wave region using the Lamb-dip technique in order to increase the instrumental resolving power and so to analyze the hyperfine structure of the rotational transitions.
Abstract: The pure rotational spectrum of C17O has been observed in the millimeter- and submillimeter-wave region using the Lamb-dip technique in order to increase the instrumental resolving power and so to analyze the hyperfine structure of the rotational transitions. The accuracy of the measurements have been evaluated to lie within ±1 kHz. Under these conditions, it has been possible to obtain very accurate values of the B0 and D0 spectroscopic constants and of the 17O nuclear electric quadrupole coupling and spin–rotation constants.
50 citations
TL;DR: In this article, the authors investigated the self and pressure broadening of the J = 9←8 transition of O 12 CS and O 13 CS and the J + 1← J, with J = 0, 1, 2, 3, rotational transitions of 12 CO and 13 CO.
31 citations
22 citations
TL;DR: In this article, a comprehensive anharmonic vibrational analysis of cis-1-chloro-2-fluoroethylene and its isotopomers was performed on the basis of a complete ab initio quartic force field constructed by means of second-order M⊘ller-Plesset perturbation theory (MP2) and the coupled-cluster singles and doubles approach, augmented for structural optimization and harmonic force field by a contribution of connected triple excitations (CCSD(T)).
Abstract: A comprehensive anharmonic vibrational analysis of cis-1-chloro-2-fluoroethylene and its isotopomers has been performed on the basis of a complete ab initio quartic force field constructed by means of second-order M⊘ller-Plesset perturbation theory (MP2) and the coupled-cluster singles and doubles approach, augmented for structural optimization and harmonic force field by a contribution of connected triple excitations (CCSD(T)). The theoretical force field was scaled by global least-squares fitting to all spectroscopic data and parameters experimentally determined for this molecule. This final force field, employing standard perturbation theory, yields a complete set of spectroscopic molecular constants providing a critical assessment of experimental rotational and centrifugal distortion constants, fundamentals, overtones, and combination bands determined over many years. Effects of Fermi and Darling-Dennison resonances were included by matrix diagonalization.
9 citations
TL;DR: The rotational spectrum of the unstable ClBS molecule has been investigated in the millimeter-wave region, from 80 to 195 GHz as mentioned in this paper, taking simultaneously into account both the Fermi resonance between the 10 0 0 and 02 0 0 states, and l -type resonance effects in the v 2 = 2 vibrational state.
7 citations