1. I. Physikalisches Institut, University of Cologne, Zülpicher St. 77, 50937 Cologne, Germany
2. Institute of Spectroscopy, Russian Academy of Sciences, Fizicheskaya St. 5, 142190 Troitsk, Moscow, Russia
3. Department of Optics and Spectroscopy, Tomsk State University, 36 Lenin Ave., 634050 Tomsk, Russia
4. University Grenoble Alpes, IPAG, F-38000 Grenoble, France
5. CNRS, IPAG, F-38000 Grenoble, France
6. Theoretical Chemistry, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands