_{Molcol : a program for solving atomic and molecular
collision problems}

Flower, Bourhis and Launay (2000,
Computer Physics Communications, 131, 187) have published a computer code, molcol.f, which solves problems of
atomic and molecular scattering, using the quantal coupled channels method. Sample
data sets are provided for He-H_{2} rovibrationally inelastic scattering (molcol.dat1_He-H_{2},
molcol.dat2_He-H_{2})
and for the excitation of fine structure transitions of 0 in collisions with H_{2}
(molcol.dat1_0-H_{2},
molcol.dat2_0-H_{2}).

Also required are the routines which interpolate the interaction potentials : cpot.f_He-H_{2} and cpot.f_0-H_{2} .

Matrix multiplication and inversion routines are linked from the blas and lapack libraries.