Near YRAST study of the fpg shell nuclei NI-58, Cu-61, and Zn-61 - INSPIRE

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Near YRAST study of the fpg shell nuclei NI-58, Cu-61, and Zn-61

1999

18 pages

Published in:

Phys.Rev.C 60 (1999) 064308

DOI:

10.1103/PhysRevC.60.064308

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Abstract: (APS)

The medium spin, near yrast states of the fpg shell nuclei 58Ni, 61Cu, and 61Zn have been studied following the fusion evaporation of a 24Mg beam and a 40Ca target. Discrete transitions were unambiguously identified using the AYEBALL gamma-ray array in conjunction with the Argonne fragment mass analyzer and a split anode ionization chamber. The decay schemes of 2858Ni, 2961Cu, and 3061Zn have been extended with the results of gamma-gamma coincidences and directional correlation from oriented state measurements used to determine the level excitation energies, spins, and parities of a number of near yrast states. The decay schemes deduced are compared with previous work and interpreted in terms of shell model calculations, with a restricted basis of the f5/2, p3/2, p1/2 orbitals outside a 2856Ni core, and either the g9/2 orbital with a closed core, or f7/2 excitations from the core.

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