Berlin 2001 – wissenschaftliches Programm
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MO: Molekülphysik
MO 7: Posters Wednesday: Theory: Structure and Dynamics
MO 7.7: Poster
Mittwoch, 4. April 2001, 12:30–15:00, AT3
Towards an understanding of LiH dynamics in the early universe — •Enrico Bodo1, Rocco Martinazzo2, and F.A. Gianturco1 — 1Department of Chemistry, University of Rome, Italy — 2Department of Physical Chemistry and Electrochemistry, University of Milan, Italy
Some of the possible reaction pathways of the LiH chemistry in a dust-free, low density medium have been considered looking at the features of the electronic potential energy surfaces of the LiH2+ system[1]. On the basis of our results, we analyze in details the different possible reactive pathways between the mentioned species. Useful information could be extracted by also analysing the spatial properties of the calculated adiabatic potentials. In particular some of the reactions involving LiH/LiH+, wich are usually taken to be quite efficient in the general astrophysical literature[2], are shown not to be likely to occur in a primordial environment. The reported calculations exclude any non-adiabatic interactions between the two lower-lying potential energy surfaces and, thus, any fast, non-radiative hopping between the two electronic states.
1 E. Bodo, F.A. Gianturco, R. Martinazzo, JPC, 2000, in press.
2 D. Galli, F. Palla, A&A, 335, 403, 1998.