ELECTRON-SCATTERING FROM H-2(- RESONANCES IN THE SIGMA-SYMMETRY AND PI-SYMMETRY() )

We present results of calculations for e(-) + H-2(+) scattering in the energy regime below the first excited state for resonance symmetries Sigma and Pi. We employ three distinct and independent methods: close- coupling linear algebraic, effective optical potential linear algebrai c, and R matrix. We report extended calculations on the (1) Pi(g), res onance, important to dissociative recombination. We show binding of th e (1) Sigma(g), state resonance between 2.6 and 2.7 bohrs. Our (1) Sig ma(u) state results agree very well with previous calculations and res ide a factor of 2 below a recent experiment.