Abstract
Spectra in the visible and near ultraviolet wavelength region (200-600 nm) have been recorded during collisions between five times ionized nitrogen ions (produced by an ECR-ion source) and a neutral lithium gas target. Besides the collisional aspects which will be presented elsewhere, the experiments yielded numerous interesting features from a spectroscopic point of view which we present here. Many previously unknown lines show up in our spectra, strong ones amongst them. Most lines can be classified as transitions between 1s2nl configurations in the N V term system produced by a single electron capture process. We also observed transitions between configurations 1s2s(3S)nl with high n and l values. These are populated if an electron is captured by metastable N5+ ions which are known to be produced in an ECR ion source. From line intensities we estimated a fraction of about 5% metastable ions in the N5+ beam. Some new lines in N IV with configurations 1s22s(2S)nl and 1s22p(2P)nl were identified. Those configurations were produced when two electrons were captured by a N5+ projectile.
Published Version
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