The nuclear structure of neutron-rich N>126 nuclei has been investigated following their production via relativistic projectile fragmentation of a E/A=1 GeV 238U beam. Metastable states in the N=128 isotones 208Hg and 209Tl have been identified. Delayed γ-ray transitions are interpreted as arising from the decay of Iπ=(8+) and (17/2+) isomers, respectively. The data allow for the so far most comprehensive verification of the shell-model approach in the region determined by magic numbers Z<82 and N>126.
Nuclear structure "southeast" of Pb-208 : isomeric states in 208Hg and 209Tl / N. Al Dahan, Z. Podolyak, P.H. Regan, M. Gorska, H. Grawe, K.H. Maier, J. Gerl, S.B. Pietri, H.J. Wollersheim, N. Alkhomashi, A.Y. Deo, Bacelar, A.M. Denis, G. Farrelly, S.J. Steer, A.M. Bruce, P. Boutachkov, C. Domingo Pardo, A. Algora, J. Benlliure, A. Bracco, E. Calore, E. Casarejos, I.J. Cullen, P. Detistov, Z. Combradi, M. Doncel, F. Farinon, W. Gelletly, H. Geissel, N. Goel, J. Grebosz, R. Hoischen, I. Kojouharov, N. Kurz, S. Lalkovski, S. Leoni, F. Molina, D. Montanari, A.I. Morales, A. Musumarra, D.R. Napoli, R. Nicolini, C. Nociforo, A. Prochazka, W. Prokowocz, B. Rubio, D. Rudolph, H. Scaffner, P. Stmen, I. Szarka, T. Swan, J.S. Thomas, J.J. Valiente Dobon, S. Verma, P.M. Walker, H. Weick. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 80:6(2009), pp. 061302.061302.1-061302.061302.5. [10.1103/PhysRevC.80.061302]
Nuclear structure "southeast" of Pb-208 : isomeric states in 208Hg and 209Tl
A. Bracco;S. Leoni;D. Montanari;
2009
Abstract
The nuclear structure of neutron-rich N>126 nuclei has been investigated following their production via relativistic projectile fragmentation of a E/A=1 GeV 238U beam. Metastable states in the N=128 isotones 208Hg and 209Tl have been identified. Delayed γ-ray transitions are interpreted as arising from the decay of Iπ=(8+) and (17/2+) isomers, respectively. The data allow for the so far most comprehensive verification of the shell-model approach in the region determined by magic numbers Z<82 and N>126.
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