Transition strengths in Nb-86 and Zr-86

Kaye, R.A.; Adams, J.B.; Hale, A.; Smith, C.; Solomon, G.Z.; Tabor, S.L.; Garcia-Bermudez, G.; Cardona, M.A.; Filevich, A.; Szybisz, L.

doi:10.1103/PhysRevC.57.2189

Transition strengths in Nb-86 and Zr-86

May, 1998

6 pages

Published in:

Phys.Rev.C 57 (1998) 2189-2195

DOI:

10.1103/PhysRevC.57.2189

View in:

Nuclear Science References

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Abstract: (APS)

Mean lifetimes of states in 86Nb and 86Zr produced by the 58Ni(32S,3pn)86Nb and 58Ni(32S,4p)86Zr reactions at 130 MeV have been measured using the recoil-distance method. The B(E2) strength of 11(2) W.u. for the 8+→6+ transition in 86Nb implies weak collectivity at low excitation energies for the π=+yrast band. The weak dipole transition strength of the 8+→7 decay suggests that the configuration for the 7ħ state is different from that of the other yrast states. In general, the B(E2) rates obtained for transitions in 86Zr agree with those previously published, thus supporting the suggestion of a weakly collective structure based on shell-model excitations at low energies. Hartree-Fock-Bogolyubov cranking calculations indicate a spherical shape for low-spin vacuum configuration states in 86Zr.