1. Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
2. Univ. Lille, UMR 8523–Physique des Lasers Atomes et Molécules, F-59000 Lille, France
3. CNRS, UMR 8523, F-59000 Lille, France
4. ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
5. Department of Control and Power Engineering, Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland
6. Department of Physical Sciences, The Open University, Walton Hall, MK7 6AA Milton Keynes, United Kingdom
7. School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
8. Institute of Mathematical Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia