Vibrational excitation of the N2+ first negative (0,0), (1,0) and (2,0) bands by electron impact: a theoretical study using the R-matrix approach

O Nagy, C P Ballance, K A Berrington, P G Burke, B M McLaughlin

Research output: Contribution to journalArticlepeer-review

Abstract

Ab initio cross section calculations for vibronic excitation using the R -matrix approach have been performed on the N 2 + molecular ion complex. A three-state close-coupling expansion is used where the electronic target states; X 2 g + , A 2 u and B 2 u + of the molecular cation are represented by a valence configuration-interaction approximation. A non-adiabatic approximation is invoked to study vibronic excitation for the first three negative bands, (0,0), (1,0) and (2,0) of the X-B transition (B 2 u + v ´ X 2 g + v ´´ ) of N 2 + . Fixed-nuclei and non-adiabatic cross section results are compared with the available experimental data for the (0,0) band and the breakdown of the adiabatic fixed-nuclei approximation is clearly evident for the vibronic excitation of the (1,0) and (2,0) bands in this molecular ion complex.
Original languageEnglish
Pages (from-to)L469
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume32
Issue number16
Publication statusPublished - 28 Aug 1999

Keywords

  • diatomics
  • unassigned

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