1. Laboratoire Francis Perrin, CNRS URA 2453, CEA, IRAMIS, Service des Photons Atomes et Molécules, F-91191 Gif/Yvette, France, Department of Molecular and Laser Physics, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Department of Physics, Faculty of Sciences, University of Ngaoundere, P.O. Box 454 Ngaoundere, Cameroon, and Laboratoire Modélisation et Simulation Multi-Echelle, Université Paris-Est, MSME FRE 3160 CNRS 5 bd Descartes...