Absolute Photoionization Cross Section of K+ Ions.
F. Folkmann, H. Kjeldsen, H. Knudsen, M.S.Rasmussen, J.B.West(x), and T.Andersen
Institute of Physics and Astronomy, University of Aarhus, Denmark
x)Daresbury Laboratory, UK

The absolute photoionization cross section of the K+ ion has been measured
within the photon energy range 31-47 eV applying the undulator beamline at
the ASTRID storage ring. In addition, the structural properties of the
3s-np(n=4-6) window resonances have been determined with improved accuracy
compared to the recent data obtained with the dual plasma technique.