Vibrational- and Rotational-State Dependence of Dissociative Attachment ine-H2Collisions

Resonant scattering theory is applied to the calculation of $e$-${\mathrm{H}}_2$ dissociative attachment cross sections near threshold for several vibrational and rotational states of the ${\mathrm{H}}_2$ molecule. Typical values just above threshold are, in ${\mathrm{cm}}^2$, 2.8×${10}^{-21\mathrm{}}$ for the ground state ($v=0\mathrm{}$, $J=0\mathrm{}$), 8.3×${10}^{-20\mathrm{}}$ for (1, 0), 1.0×${10}^{-18\mathrm{}}$ for (2, 0), and 3.5×${10}^{-20\mathrm{}}$ for (0, 10). The effect of rotational excitation is found to be significant, although it is not as large as suggested by Chen and Peacher.