H2:H2 inelastic collisions rate coefficients

The set includes all relevant rates needed for diagnostics based on the simulation of quadrupole infrared spectra of H_2_. The reported set was obtained from a quantum scattering close-coupling calculation employing a recent version of the MOLSCAT code, a high-level potential energy surface, and rotational energies of the H_2_ molecules with spectroscopic accuracy.

These improvements have led to a significant increase in the accuracy with respect to previous computational results. The accuracy of the present STS rates is tested against recently reported experimental rates. Most dominant rates agree with the experiment within a 2{sigma} uncertainty (2 to 6%).