The C4H radical and the diffuse interstellar bands. an AB initio study

Details The C4H radical and the diffuse interstellar bands. an AB initio study The C4H radical and the diffuse interstellar bands. an AB initio study

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994dib..nasa...85k&link_type=abstract

In NASA. Ames Research Center, The Diffuse Interstellar Bands: Contributed Papers p 85-90 (SEE N95-15827 03-89)

Astronomy and Astrophysics

Astronomy

Diffuse Radiation, Electron Transitions, Ground State, Hydrocarbons, Interstellar Matter, Interstellar Radiation, Molecular Excitation, Molecular Spectra, Radicals, Radio Astronomy, Astronomical Spectroscopy, Electron States, Interstellar Chemistry, Molecular Clouds, Spectrum Analysis

Scientific paper

An ab initio study of the low-lying electronic states of C4H has been presented where the species studied has a chi(2)sigma(+) ground state and two low lying pi states. Based on the vertical and adiabatic excitation energies between those states it is suggested that the 4428 A diffuse interstellar band is not carried by C4H. The application of the particle in a box model shows strong coincidences between the strong DIB's and predicted wavelengths of pi-pi transitions in C(2n)H series. Based on those coincidences, it is suggested the C(2n)H species as good candidates for carriers of diffuse interstellar bands.

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