Hannover 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 3: Theory: Quantum Chemistry and Molecular Dynamics

MO 3.6: Vortrag

Montag, 8. März 2010, 18:00–18:15, F 102

Calculation of the structure of H₃⁻ negative ion, and of its formation rate in the interstellar medium — Mehdi Ayouz¹, •Viatcheslav Kokoouline¹, Romain Guérout¹, Maurice Raoult¹, Jacques Robert¹, Roland Wester², and Olivier Dulieu¹ — ¹Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Orsay, France — ²Physikalisches Institut, Universität Freiburg, Germany

We computed a new accurate potential energy surface for the simplest negative triatomic ion H₃⁻. We determined its permanent dipole moment, bound states, rotational constants, predissociated vibrational resonances and their lifetimes. We also present the theory of radiative association of atoms and molecules, applied to the (H₂-H⁻) system. We suggest a way to detect H₃⁻ in the interstellar medium, which would be also a probe for the presence of H⁻.