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Physical Review C 78 (2008) 047301
Coulomb excitation of $^{68}$Ni at safe energies
N. Bree, I. Stefanescu, P.A. Butler, J. Cederkäll, T. Davinson, P. Delahaye, J. Eberth, D. Fedorov, V.N. Fedosseev, L.M. Fraile, S. Franchoo1, G. Georgiev2, K. Gladnishki, M. Huyse, O. Ivanov, J. Iwanicki, J. Jolie, U. Köster3, Th. Kröll, R. Krücken, B.A. Marsh, O. Niedermaier, P. Reiter, H. Scheit, D. Schwalm, T. Sieber, J. Van De Walle, P. Van Duppen, N. Warr, D. Weisshaar, F. Wenander, S. Zemlyanoy

The $B(E2;0^+\to2^+)$ value in $^{68}$Ni has been measured using Coulomb excitation at safe energies. The $^{68}$Ni radioactive beam was post-accelerated at the ISOLDE facility (CERN) to 2.9 MeV/u. The emitted $\gamma$ rays were detected by the MINIBALL detector array. A kinematic particle reconstruction was performed in order to increase the measured c.m. angular range of the excitation cross section. The obtained value of 2.8$\pm$1.0 10$^2$ e$^2$fm$^4$ is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low transition probability.
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
2 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
3 :  IPNL - Institut de Physique Nucléaire de Lyon
Physique/Physique Nucléaire Expérimentale
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