Jls. Lino et al., ELASTIC CROSS-SECTIONS AND ANNIHILATION PARAMETER FOR E(-H-2 SCATTERING USING THE SCHWINGER MULTICHANNEL METHOD()), Physical review. A, 58(5), 1998, pp. 3502-3506
We report detailed results for positron-H-2 collisions obtained with t
he Schwinger multichannel method. Our calculations include annihilatio
n parameter, differential, integral, and momentum transfer cross secti
ons for energies below the positronium formation threshold. The calcul
ations were carried out in the static-plus-polarization approximation
with symmetry-resolved cross sections. Energy (temperature) dependence
and symmetry-resolved contributions for the annihilation parameter Z(
eff) are also reported. Our ab initio integral cross sections are foun
d to be in good agreement with the experimental data. [S1050-2947(98)0
4409-6].