Affiliation: | (1) Institute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany (Fax: +49-6221/54-4255), DE;(2) King Saud University, P.O. Box 2455, Riyadh-11451, Kingdom of Saudi Arabia, SA;(3) Research Group on Laser Physics of the Hungarian Academy of Sciences, P.O. Box 406, H-6701 Szeged, Hungary, HU |