There are eight data files corresponding to the two types of target molecule (ortho -
and para-H_{2}) and the four perturbers (H, He, para-H_{2} and ortho-H_{2}).
In the case of excitation by H, quantal results for non-reactive scattering, obtained
using the BKMP2 potential (Boothroyd et al, 1996, J.Chem.Phys, 104, 7139) are given. A
prescription for including the contributions of reactive scattering is described by Le
Bourlot et al. (1998).

For each value of the kinetic temperature, *T* (K), the rate coefficients are
given in the form of a square matrix. The values of the rovibrational quantum numbers, (*v*,*J*),
of the initial states of H_{2} label the columns; the corresponding labelling of
the rows, indicating the final states, is implicit. Thus, the upper right triangle of each
matrix is for de-excitation, the lower left triangle is for excitation. These files are
called:

- H.ortho_H2 ,
- H.para_H2 ,
- He.ortho_H2 ,
- He.para_H2 ,
- para_H2.ortho_H2 ,
- para_H2.para_H2 ,
- ortho_H2.ortho_H2 ,
- ortho_H2.para_H2 .