The double isobaric analog of 11 Li in 11 B

R. J. Charity, L. G. Sobotka, K. Hagino, D. Bazin, J. Clifford, M. A. Famiano, A. Gade, S. Hudan, S. A. Komarov, Jenny Lee, S. P. Lobastov, S. M. Lukyanov, W. G. Lynch, C. Metelko, M. Mocko, A. M. Rogers, H. Sagawa, 7 A. Sanetullaev, M. B. Tsang, M. S. Wallace, M. J. van Goethem, and A. H. Wuosmaa Departments of Chemistry and Physics, Washington University, St. Louis, Missouri 63130. Department of Physics, Tohoku University, Sendai 980-8578, Japan National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008. Department of Chemistry and Indiana University Cyclotron Facility, Indiana University, Bloomington, IN 47405. Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8560, Japan RIKEN Nishina Center, Wako 351-0198, Japan Kernfysisch Versneller Institut, NL-9747 AA Groningen, The Netherlands. The double isobaric analog state of Li in B has been identified in the Be(p,2n)B reaction. The state was discovered through its two-proton decay branch. From detected 2p + Li events, its excitation energy was determined to be 33.57(8) MeV using the invariant mass method. This excitation energy was found consistent with a halo structure expected for all members of the isobaric sextet containing Lig.s.. The momentum correlations of the detected protons, were found to have both “diproton” and “cigar” components.