[1] Univ Bordeaux, LAB, UMR 5804, F-33270 Floirac, France
[2] CNRS, LAB, UMR 5804, F-33270 Floirac, France
[3] Univ Bordeaux, ISM, CNRS, UMR 5255, F-33400 Talence, France
[4] CNRS, ISM, UMR 5255, F-33400 Talence, France
[5] Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA
[6] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
[7] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA
[8] CNRS, Inst Sci Mol Orsay, F-91405 Orsay, France
[9] Univ Paris 11, F-91405 Orsay, France
[10] CNRS, IN2P3, Inst Phys Nucl Orsay, F-91406 Orsay, France
[11] Univ Paris 11, F-91406 Orsay, France
[12] Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France
[13] CNRS, IPAG, F-38000 Grenoble, France
[14] INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy
[15] Univ Stockholm, Dept Phys, SE-10691 Stockholm, Sweden
[16] Tech Univ Chemnitz, Dept Phys, Chemnitz, Germany
[17] Acad Sinica, Inst Astron & Astrophys, Sect 4, Taipei 10617, Taiwan
[18] Univ Bourgogne, UMR CNRS 5209, Lab Interdisciplinaire Carnot Bourgogne, F-21078 Dijon, France
[19] Univ Franche Comte, UFR Sci & Tech, F-25030 Besancon, France
[20] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA
[21] Univ Rennes 1, UMR CNRS 6251, Inst Phys Rennes, F-35042 Rennes, France
[22] Univ Gothenburg, Dept Chem & Mol Biol, SE-41296 Gothenburg, Sweden
[23] Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany
[24] CNRS, UMR 5299, Lab Univ & Particules Montpellier, F-34095 Montpellier, France
[25] Univ Montpellier, F-34095 Montpellier, France
[26] UCL, Dept Phys & Astron, London WC1E 6BT, England
[27] Univ Innsbruck, Inst Ionenphys & Angew Phys, A-6020 Innsbruck, Austria