SAMOP 2023 – scientific programme

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MO: Fachverband Molekülphysik

MO 20: Poster III

MO 20.19: Poster

Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof

Collisional excitation and dissociaton of CO molecules by ion impacts and aplications to astrophysics — •Masato Nakamura — College of Science and Technology, Nihon University, Funabashi, Japan

The CO molecule is one of the most abundant molecules in interstellar space and a major component of the stellar (solar) winds is proton. Thus, the collisional excitation and collision-induced dissociation (CID) by proton impacts are expected play important roles in the chemical evolution of interstellar molecules. Here we present a theoretical work on the energy transfer and fragmentation of CO molecule by proton impact at hyperthermal energies. The classical trajectory calculation and the sudden-limit model are applied to estimate the energy transfer from translational to internal degrees of freedom. The threshold energy for the dissociaton is calcuted by for the impact of singly charged ions. For comparison, the calculation is performed also for nitrogen molecule. The nitrogen molecule is a major component of atomosphere of Titan.