Elastic scattering of intermediate- and high-energy electrons by N2and CO in the two-potential coherent approach

Abstract

Elastic differential, integral and momentum transfer cross sections are reported for the scattering of electrons by N2 and CO in the energy range 40-800 eV. The two-potential approach of Hayashin and Kuchitsu (1976) is employed, in which the total interaction potential is represented as a sum of the short- and the long-range potentials. It is found that the interference cross section term arising due to the coherent sum of the scattering amplitudes from the short- and the long-range parts of the interaction potential, is stronger than the pure long-range potential cross section term, of course, in the small angular region (<or=40 degrees ). The author also studies the multiple scattering within the molecule and finds that in the multiple scattering series the single-double (SD) term dominates over the pure double-double (DD) term in the whole energy region considered. However, there is evidence (below 100 eV) that the DD term is compatible with the SD term in the middle angles and exhibits some peaking behaviour at about 90 degrees . To evaluate elastic scattering amplitudes for each potential, a partial-wave analysis was performed. Results are discussed and compared with the recent absolute measurements. All the author's results are in very good accord with the observed data.