Optical spectra from multiply-charged collisions of O^q+ on N2 and Ar.
Abstract
As part of a program to simulate optical and x-ray emission from multiply-charged solar wind ion collisions with cometary gases, we have observed line spectra in the visible (400-800nm) from O^5+, O^3+ and O^2+ ion collisions. The ions are generated in the University of Connecticut Van de Graaff laboratory. Initial identifications indicate collision-induced lines from final projectile charge states ranging from q to q-2. Although the mechanisms are not yet clear, we cannot exclude contributions from initial processes involving more than single or double-electron capture from the target atom or molecule. The electron capture may be followed by possible autoionization. Some N^+ lines were observed from target dissociation with excitation in the case of O^3+ on N_2. Related experiments in the XUV spectral range are underway in collaboration with Ara Chutjian's group at JPL/Caltech.
- Publication:
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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- May 2003
- Bibcode:
- 2003APS..DMP.D1166E