1. Laboratoire de Chimie Théorique, Sorbonne Université, CNRS, Paris F-75005, France
2. Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
3. Laboratory of Quantum Optics, University of Nova Gorica, Si-5270 Ajdovščina, Slovenija
4. Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14-km 163.5 in AREA Science Park, 34149 Basovizza, Trieste, Italy