A method to characterize electronic states of 4s ionized Rb by combined laser and synchrotron spectroscopyJ. Schulz1, 2, E. Loos2, M. Huttula2, S. Heinäsmäki2, S. Svensson3, S. Aksela2 and H. Aksela2
1 Center for Free-Electron Laser Science (CFEL) at DESY - D-22603 Hamburg, Germany, EU
2 Department of Physical Sciences - P.O. Box 3000, FIN-90014 University of Oulu, Finland, EU
3 Department of Physics, Uppsala University - Box 530, SE-75121 Uppsala, Sweden, EU
received 22 May 2008; accepted in final form 27 June 2008; published September 2008
published online 29 August 2008
Photoelectron studies of laser-excited atomic states can reveal more information about the final ionic states than ground-state photoemission. The possibility to tune the laser to distinct fine-structure sub-states of the excited states allows to select specific angular-momentum couplings of the valence electron that are conserved during photoemission. In the 4s photoemission of laser-excited rubidium we use this method to determine the final-state energies and widths of doubly excited ionic states and characterize the angular-momentum couplings.
32.80.Fb - Photoionization of atoms and ions.
42.62.Fi - Laser spectroscopy.
© EPLA 2008