Double-magic nature of Sn 132 and Pb 208 through lifetime and cross-section measurements

J. M. Allmond, A. E. Stuchbery, J. R. Beene, A. Galindo-Uribarri, J. F. Liang, E. Padilla-Rodal, D. C. Radford, R. L. Varner, A. Ayres, J. C. Batchelder, A. Bey, C. R. Bingham, M. E. Howard, K. L. Jones, B. Manning, P. E. Mueller, C. D. Nesaraja, S. D. Pain, W. A. Peters, A. RatkiewiczK. T. Schmitt, D. Shapira, M. S. Smith, N. J. Stone, D. W. Stracener, C. H. Yu

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Single-neutron states in Sn133 and Pb209, which are analogous to single-electron states outside of closed atomic shells in alkali metals, were populated by the (Be9, Be8) one-neutron transfer reaction in inverse kinematics using particle-γ coincidence spectroscopy. In addition, the s1/2 single-neutron hole-state candidate in Sn131 was populated by (Be9, Be10). Doubly closed-shell Sn132 (radioactive) and Pb208 (stable) beams were used at sub-Coulomb barrier energies of 3 MeV per nucleon. Level energies, γ-ray transitions, absolute cross sections, spectroscopic factors, asymptotic normalization coefficients, and excited-state lifetimes are reported and compared with shell-model expectations. The results include a new transition and precise level energy for the 3p1/2 candidate in Sn133, new absolute cross sections for the 1h9/2 candidate in Sn133 and 3s1/2 candidate in Sn131, and new lifetimes for excited states in Sn133 and Pb209. This is the first report on excited-state lifetimes of Sn133, which allow for a unique test of the nuclear shell model and Sn132 double-shell closure.

Original languageEnglish
Article number172701
JournalPhysical Review Letters
Issue number17
StatePublished - 30 Apr 2014
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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