COMPLETION OF A HYBRID-THEORY CALCULATION OF THE PI(G) RESONANCE IN ELECTRON-N2 SCATTERING

A calculation of e-N2 scattering in the vicinity of the 2.4-eV (PI(g)) resonance has been completed. The main element of the calculation is a 15-term vibrational close-coupling expansion, reduced to coupled two -dimensional partial differential equations (PDE's), and solved using the noniterative PDE technique. The potential consists of static, exch ange, and polarization parts; each part has been (previously) derived in a manner appropriate to its importance in the scattering equation. Results for the absolute total cross section, both in magnitude and sh ape of the substructure in the resonance region (1.5 < k2 < 3 eV), are in excellent accord with experiment. Angular distributions are also c alculated and found to vary significantly in shape for different energ ies in the immediate vicinity of the center of the resonance (2.05 < k 2 < 2.15 eV), indicating the need for differential measurements at a f iner grid in energy and therefore requiring even better energy resolut ion. A comparison with other calculations and a discussion of some the oretical aspects are also included.