1. Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
2. Centre for Computational Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK
3. Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, UK
4. Laboratoire de Spectroscopie Ultrarapide, Ecole Polytechnique Fédérale de Lausanne, ISIC, FSB, CH-1015 Lausanne, Switzerland
5. ISM-CNR, Istituto di Struttura dei Materiali, LD2 Unit, 34149 Trieste, Italy
6. IOM-CNR, Istituto Officina dei Materiali, 34149 Trieste, Italy
7. Department of Chemistry, 20 Gordon Street, London, WC1H 0AJ, UK