Reaction rates of C(+) with OH at low interstellar temperatures

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Carbon, Hydroxyl Radicals, Interstellar Chemistry, Interstellar Matter, Ion Temperature, Reaction Kinetics, Hydrogen Ions, Ionic Reactions, Molecular Interactions

Scientific paper

The adiabatic rotational state method is used to investigate the reaction of C(+) ions with the OH radical for the formation of CO and CO(+) at low interstellar temperatures. The OH molecule being in an X 2Pi state, full account has been taken of the coupling of the electronic and rotational angular momentum in treating the collision dynamics of the ion-molecule system. The potential energies of the adiabatic rotational states correlated to the lowest rotational state manifolds of the 2Pi3/2 and 2Pi1/2 electronic states of OH are first obtained. The adiabatic capture model is subsequently used to determine the reactive rate constants for temperatures in the range from 1 to 200 K.

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