1. National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
2. Department of Chemistry and
Biochemistry, Texas Tech University, Lubbock,
Texas 79409-1061, United States
3. Center for Free-Electron Laser Science, DESY, Notkestraße 85, 22607 Hamburg,
Germany
4. Physikalisches
Institut, Universität Freiburg,
Hermann-Herder-Straße
3, 79104 Freiburg, Germany
5. Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Technikerstraße 25/3, 6020 Innsbruck, Austria
6. Department
of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0340, United States
7. EMSL, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington
99352, United States
8. Physikalisches
Institut, Universität Heidelberg, Philosophenweg 12, 69120
Heidelberg, Germany