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- Grawe, H, et al.
(författare)
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Experimental approach towards shell structure at Sn-100 and Ni-78
- 2002
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Ingår i: Nuclear Physics, Section A. - 0375-9474. ; 704, s. 211-222
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Tidskriftsartikel (refereegranskat)abstract
- The status of experimental approach to Sn-100 and Ni-78 is reviewed. Revised single particle energies for neutrons are deduced for the N=Z=50 shell closure and evidence for low lying I-pi=2(+) and 3(-) states is presented. Moderate E2 polarization charges of 0.1 e and 0.6 e are found to reproduce the experimental data when core excitation of Sn-100 is properly accounted for in the shell model. For the neutron rich Ni region no conclusive evidence for an N=40 subshell is found, whereas firm evidence for the persistence of the N=50 shell at Ni-78 is inferred from the existence of seniority isomers. The disappearance of this isomerism in the mid nug(9/2) shell is discussed.
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