Coulomb Excitation of Neutron-Rich Zn Isotopes: First Observation of the 2+_1 State in 80Zn
- Van De Walle, J.
- Aksouh, F.
- Ames, F.
- Behrens, T.
- Bildstein, V.
- Blazhev, A.
- Cederkäll, J.
- Clément, E.
- E. Cocolios, T.
- Davinson, T.
- Delahaye, P.
- Eberth, J.
- Ekström, A.
- V. Fedorov, D.
- N. Fedosseev, V.
- M. Fraile, L.
- Franchoo, S.
- Gernhauser, R.
- Georgiev, G.
- Habs, D.
- Heyde, K.
- Huber, G.
- Huyse, M.
- Ibrahim, F.
- Ivanov, O.
- Iwanicki, J.
- Jolie, J.
- Kester, O.
- Köster, U.
- Kröll, T.
- Krücken, R.
- Lauer, M.
- F. Lisetskiy, A.
- Lutter, R.
- A. Marsh, B.
- Mayet, P.
- Niedermaier, O.
- Nilsson, T.
- Pantea, M.
- Perru, O.
- Raabe, R.
- Reiter, P.
- Sawicka, M.
- Scheit, H.
- Schrieder, G.
- Schwalm, D.
- D. Seliverstov, M.
- Sieber, T.
- Sletten, G.
- Smirnova, N.
- Stanoiu, M.
- Stefanescu, I.
- Thomas, J.C.
- Valiente-Dobón, J.J.
- Van Duppen, P.
- Verney, D.
- Voulot, D.
- Warr, N.
- Weisshaar, D.
- Wenander, F.
- H. Wolf, B.
- Zielinska, M.
DOIAbstract
Neutron-rich, radioactive Zn isotopes were investigated at the Radioactive Ion Beam facility REX-ISOLDE (CERN) using low-energy Coulomb excitation. The energy of the 2 state in 78Zn could be firmly established and for the first time the 2+0 transition in 80Zn was observed at 1492(1) keV. B(E2,20) values were extracted for 74,76,78,80Zn and compared to large scale shell model calculations. With only two protons outside the Z=28 proton core, 80Zn is the lightest N=50 isotone for which spectroscopic information has been obtained to date. Two sets of advanced shell model calculations reproduce the observed B(E2) systematics. The results for N=50 isotones indicate a good N=50 shell closure and a strong Z=28 proton core polarization. The new resu...
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