Structure of states in Be-12 via the Be-11(d, p) reaction

R. Kanungo, A. T. Gallant, M. Uchida, C. Andreoiu, R. A. E. Austin, D. Bandyopadhyay, G. C. Ball, J. A. Becker, A. J. Boston, H. C. Boston, B. A. Brown, L. Buchmann, S. J. Colosimo, R. M. Clark, D. Cline, D. S. Cross, H. Dare, B. Davids, T. E. Drake, M. DjongolovP. Finlay, N. Galinski, P. E. Garrett, A. B. Garnsworthy, K. L. Green, S. Grist, G. Hackman, L. J. Harkness, A. B. Hayes, D. Howell, A. M. Hurst, H. B. Jeppesen, K. G. Leach, A. O. Macchiavelli, D. Oxley, C. J. Pearson, B. Pietras, A. A. Phillips, S. V. Rigby, C. Ruiz, G. Ruprecht, F. Sarazin, M. A. Schumaker, A. C. Shotter, C. S. Sumitharachchi, C. E. Svensson, I. Tanihata, S. Triambak, C. Unsworth, S. J. Williams, P. Walden, J. Wong, C. Y. Wu

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The s-wave neutron fraction of the 0(+) levels in Be-12 has been investigated for the first time through the Be-11(d, p) transfer reaction using a 5 A MeV B-11 beam at TRIUMF, Canada. The reaction populated all the known bound states of Be-12. The ground state s-wave spectroscopic factor was determined to be 0.28(-0.07)(+0.03) while that for the long-lived 0(2)(+) excited state was 0.73(-0.40)(+0.27). This observation, together with the smaller effective separation energy indicates enhanced probability for an extended density tail beyond the Be-10 core for the 0(2)(+) excited state compared to the ground state. (C) 2009 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)391-395
Number of pages5
JournalPhysics Letters B
Issue number4-5
Publication statusPublished - 4 Jan 2010


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