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Title: Magicity of the Ni-68 semidouble-closed-shell nucleus probed by Gamow-Teller decay of the odd-A neighbors
Authors: Mueller, WF ×
Bruyneel, Bart
Franchoo, Serge
Grawe, H
Huyse, Marc
Koster, U
Kratz, KL
Kruglov, K
Kudryavtsev, Yuri
Pfeiffer, B
Raabe, Riccardo
Reusen, Ils
Thirolf, P
Van Duppen, Piet
Van Roosbroeck, Jan
Vermeeren, L
Walters, WB
Weissman, L #
Issue Date: Nov-1999
Publisher: American physical soc
Series Title: Physical Review Letters vol:83 issue:18 pages:3613-3616
Abstract: The particle-hole excitations through the N = 40 subshell around Ni-68 have been studied by the beta decay of Co-69 and Ni-69. The half-life of Co-69 was measured to be 0.22(2) s, and a new beta-decaying isomer with a half-life of 3.5(5) s was identified in Ni-69. From the decay of the Ni-69 isomer a 9(4)% mixing of the pi p(3/2)(+1)nu p(1/2)(-2)nu g(9/2)(+2) configuration into the ground state of Cu-69 can be deduced. Significant polarization of the Ni-68 core nucleus is observed with the coupling of a single nucleon, which implies a rapid decrease in the stabilizing effect of the N = 40 semimagic shell gap.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
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× corresponding author
# (joint) last author

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