High spin states in153Er |
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| Authors: | C. Foin S. André D. Barnéoud G. Bastin A. Peghaire J. P. Thibaud |
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| Affiliation: | 1. Institut des Sciences Nucléaires (I N2 P3 -U.S.M.G.), Grenoble, France
2. Laboratoire S. Rosenblum du C.S.N.S.M., Orsay, France
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| Abstract: | High spin states in153Er have been populated in the144Sm(12C, 3n)133Er reaction. Excitation functions, lifetimes, angular distributions,γ-γ coincidences and internal conversion coefficients were measured. Three isomeric states at 2.75 MeV (T 1/2=400 ns), 2.95 MeV (T 1/2～10 ns) and 5.2 MeV (T 1/2=200 ns) have been observed. A fourth isomer seems to be weakly excited above 6.8 MeV. The level scheme proposed is discussed in term of the nuclear shell model. |
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