APPLICATION OF THE METHOD OF CONTINUED FRACTIONS FOR
ELECTRON SCATTERING BY NONLINEAR MOLECULES

Evandro M.S. Ribeiro, Luiz E. Machado and Mu-Tao Lee

Departamento de Fisica, UFSCar, 13565-905, Sao
Carlos, Sao Paulo, Brazil
Departamento de Quimica, UFSCar, 13565-905, Sao
Carlos, Sao Paulo, Brazil

The applicability of the method of continued fractions (MCF) is extended
to studies of single-channel electron scattering by closed-shell molecules 
with arbitrary geometry. In this work we present calculated differential,
integral and momentum-transfer cross sections for the elastic scattering of 
electrons by ammonia molecules in the static-exchange approximation for 
incident energies in the (5-100)-eV range. The comparison between our
results and the available experimental and theoretical data is encouraging.