Comparison of local exchange potentials for electron-N2 scattering

John R. Rumble, Donald G. Truhlar

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We consider vibrationally and electronically elastic electron scattering by N2 at 2-30 eV impact energy. We consider static, static-exchange, and static-exchange-plus-polarization potentials, Cade-Sales-Wahl and INDO/1s wave functions, and semiclassical exchange and Hara free-electron-gas exchange potentials. We show that the semiclassical exchange approximation is too attractive at low energy for N2. We show quantitatively by consideration of partial and total integral cross sections how the effects of approximations to exchange become smaller as the incident energy is increased until these differences are about 8% for the total integral cross section at 30 eV.

Original languageEnglish (US)
Pages (from-to)5223-5227
Number of pages5
JournalThe Journal of chemical physics
Issue number9
StatePublished - Jan 1 1980


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