1. Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
2. INFN, Laboratori Nazionali del Gran Sasso, Assergi, 67010 L’Aquila, Italy
3. INFN, Laboratori Nazionali di Legnaro, Legnaro, 35020 Padova, Italy
4. Department of Physics, University of California, Berkeley, CA 94720, USA
5. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
6. INFN, Sezione di Bologna, 40127 Bologna, Italy
7. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
8. Dipartimento di Fisica, Sapienza Università di Roma, 00185 Roma, Italy
9. INFN, Sezione di Roma, 00185 Roma, Italy
10. INFN, Sezione di Genova, 16146 Genova, Italy
11. Dipartimento di Fisica, Università di Milano-Bicocca, 20126 Milano, Italy
12. INFN, Sezione di Milano Bicocca, 20126 Milano, Italy
13. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
14. Dipartimento di Fisica, Università di Genova, 16146 Genova, Italy
15. Department of Physics, University of Wisconsin, Madison, WI 53706, USA
16. INFN, Laboratori Nazionali di Frascati, Frascati, 00044 Roma, Italy
17. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay Campus, 91405 Orsay, France
18. Physics Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
19. Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
20. Department of Physics, Yale University, New Haven, CT 06520, USA
21. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
22. Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
23. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
24. Laboratorio de Fisica Nuclear y Astroparticulas, Universidad de Zaragoza, 50009 Zaragoza, Spain
25. Service de Physique des Particules, CEA/Saclay, 91191 Gif-sur-Yvette, France
26. Department of Nuclear Engineering, University of California, Berkeley, CA 94720, USA
27. INFN, Sezione di Padova, 35131 Padova, Italy
28. Dipartimento di Fisica, Università di Firenze, 50125 Firenze, Italy
29. INFN, Sezione di Firenze, 50125 Firenze, Italy
30. SUPA, Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK
31. Dipartimento di Fisica, Università di Bologna, 40127 Bologna, Italy