Abstract
We report results from a new atomic physics program using the Argonne PII ECR ion source which is being built as part of the upgrade of the Argonne Tandem-Linear Accelerator (ATLAS). Our initial experiments have been aimed at studying state-selective electron capture in ion-atom collisions using the technique of Photon Emission Spectroscopy. We are extending existing cross section measurements at low energy (<15 keV/amu) to higher energy taking advantage of the fact that the Argonne source is on a 350-kV high-voltage platform. Experiments have included measurements of capture cross sections for O/sup 6 +/ and O/sup 7 +/ on He and H/sub 2/ targets in the energy range from 1-105 keV/amu. We also present uv spectra obtained in collisions of O/sup 6 +/, O/sup 5 +/ and N/sup 5 +/ on a sodium target. 4 refs., 2 figs., 1 tab.
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