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Observation of $^{54}$Ni : Cross-conjugate symmetry in $f_{7/2}$ mirror energy differences

Abstract : Gamma decays from excited states up to J(pi)=6(+) in the N=Z-2 nucleus Ni-54 have been identified for the first time. Level energies are compared with those of the isobars Co-54 and Fe-54 and of the cross-conjugate nuclei of mass A=42. The good but puzzling f(7/2) cross-conjugate symmetry in mirror and triplet energy differences is analyzed. Shell model calculations reproduce the new data but the necessary nuclear charge-dependent phenomenology is not fully explained by modern nucleon-nucleon potentials.
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http://hal.in2p3.fr/in2p3-00111688
Contributor : Béatrice Forrler <>
Submitted on : Monday, November 6, 2006 - 10:53:11 AM
Last modification on : Tuesday, May 4, 2021 - 11:26:07 AM

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A. Gadea, S.M. Lenzi, S. Lunardi, N. Marginean, A.P. Zuker, et al.. Observation of $^{54}$Ni : Cross-conjugate symmetry in $f_{7/2}$ mirror energy differences. Physical Review Letters, American Physical Society, 2006, 97, pp.152501. ⟨10.1103/PhysRevLett.97.152501⟩. ⟨in2p3-00111688⟩

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