QUANTUM REACTIVE SCATTERING VIA THE S-MATRIX VERSION OF THE KOHN VARIATIONAL PRINCIPLE: INTEGRAL CROSS SECTIONS FOR H+H,(z+=j,=O)~H&=l, j,=l, 3)+H IN THE ENERGY RANGE &,,,=0.9-1.4 eV

Fully converged state-to-state integral cross sections are reported for rhe reaction H + H2(uI =I, =0)4H, (z+= I, jz= 1 and 3) +H overa wde range ofenergy. The calculations include up to 19 partial waves (i.e. total angular momentum quantum numbers J=O, 1, _.., 18), which yield converged I+= I cross sections for total energies from threshold (~0.9 eV) up to z 1.4 eV. Phc calculated cross sectlons are a relatively smooth function of energy, and thus in substantial disagreement with the recent experimental results of Nieh and Valentini: the energy-averaged magnitudes ofthc experimental and theoretical cross sections, however. are in good agreement. The present calculations were performed with the LSTH potential energy surface for the H, system.