1. King Saud University, Department of Chemistry, Faculty of Science, PO Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
2. Laboratoire de Physique Moléculaire, Ecole Supérieure des Sciences et Techniques de Tunis, 5 Av. Taha Hussein, Tunis 1008, Tunisia
3. King Saud University, Department of Physics and Astronomy, Faculty of Science, PO Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
4. Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes, F-77454 Champs sur Marne, France