Journal ArticleDOI
The Vibrational Energy Levels in Acetylene (III): 12C2D2
Michel Herman,M. I. El Idrissi,A. Pisarchik,Alain Campargue,A.-C. Gaillot,Ludovic Biennier,G. Di Lonardo,Luciano Fusina +7 more
TLDR
In this article, the vibrational analysis of the absorption spectrum of 12C2D2 between 5150 and 8000 cm−1, recorded by Fourier transform absorption spectroscopy, and between 12Abstract:
We have performed the rovibrational analysis of the absorption spectrum of 12C2D2 between 5150 and 8000 cm−1, recorded by Fourier transform absorption spectroscopy, and between 12 800 and 16 600 cm−1, recorded by intracavity laser absorption spectroscopy. Respectively 10 and 9 bands are reported for the first time in each range. Improved or new rovibrational parameters were obtained for 34 vibrational levels altogether. The vibrational energies we obtained, together with those reported in the literature, were taken into account to model the vibrational energy pattern in 12C2D2(X 1Σg+). The analysis was performed in successive steps, inferring each time suitable parameters. The 44/55, 11/33, 12/33, and 1/244 quartic order anharmonic resonances were introduced during the procedure. They altogether define vibrational clusters which are characterized by only two dynamical constants of motion, Ns=V1+V2+V3 and k=l4+l5.read more
Citations
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Journal ArticleDOI
The vibrational energy pattern in acetylene (iv) : updated global vibration constants for 12c2h2
TL;DR: In this paper, Temsamani et al. fitted all 253 vibrational levels in the ground electronic state of 12C2H2 with assigned rotational structure reported in the literature from absorption, stimulated emission pumping, and dispersed laser induced fluorescence spectroscopic investigations.
Journal ArticleDOI
Effective-mode representation of non-Markovian dynamics: a hierarchical approximation of the spectral density. II. Application to environment-induced nonadiabatic dynamics.
TL;DR: The non-Markovian approach developed in the companion paper, which employs a hierarchical series of approximate spectral densities, is extended to the treatment of nonadiabatic dynamics of coupled electronic states, focusing on a spin-boson-type Hamiltonian including a subset of system vibrational modes which are treated without any approximation.
Journal ArticleDOI
The vibrational spectrum of pyrrole (C4H5N) and furan (C4H4O) in the gas phase
TL;DR: In this article, the absorption spectrum of pyrrole (C5H5N) and furan (C4H4O) was recorded using a Fourier transform interferometer.
Journal ArticleDOI
Controlling bond cleavage and probing intramolecular dynamics via photodissociation of rovibrationally excited molecules
Ilana Bar,Salman Rosenwaks +1 more
TL;DR: In this paper, a double-resonance scheme was proposed for the photodissociation of rovibrationally excited ground state molecules, in which a photodociative transition is initiated from an excited rovibrational state that might substantially affect the intensity and wavelength dependence of the photo absorption spectrum.
Journal ArticleDOI
The acetylene ground state saga
TL;DR: In this article, the evolution of high-resolution spectroscopic investigation of the vibration-rotation energy states of acetylene in its ground electronic state is presented, focusing on advances co-authored by the ULB group.
References
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Journal ArticleDOI
The hitran molecular database: editions of 1991 and 1992
Laurence S. Rothman,Robert R. Gamache,R. H. Tipping,Curtis P. Rinsland,Mary Ann H. Smith,D. Chris Benner,V. Malathy Devi,J. M. Flaud,Claude Camy-Peyret,Agnes Perrin,A. Goldman,Steven T. Massie,Linda R. Brown,Robert A. Toth +13 more
TL;DR: The HITRAN molecular absorption database as mentioned in this paper contains line parameters for 31 species and their isotopomers that are significant for terrestrial atmospheric studies, including chlorofluorocarbons and other molecular species that are not amenable to line-by-line representation.
Journal ArticleDOI
On the relationship of normal modes to local modes in molecular vibrations
TL;DR: In this article, a simple model for the effective vibrational hamiltonian of the XH stretching vibrations in H2O, NH3 and CH4 is considered, based on a morse potential function for the bond stretches plus potential and kinetic energy coupling between pairs of bond oscillators.
Journal ArticleDOI
The bending energy levels of C2H2
TL;DR: In this article, the bending levels with Σt Vt(t = 4, 5) ≤ 2 were characterized by a coherent set of 34 parameters derived from the simultaneous analysis of 15 bands, performed using a matrix Hamiltonian.