Fine structure transitions of sulfur in collisions with molecular hydrogen

We calculate cross sections for fine structure transitions of S in collisions with ortho- and para-H₂ using quantum mechanical methods. The potentials are obtained with the multireference configuration interaction combined with the Douglas-Kroll-Hess Hamiltonian (MRCI-DKH) method and dispersion energies are calculated based on the polarizibilities of S and of H₂. Relaxation rate coefficients are calculated for temperatures up to 2000 K.