Title: Low energy levels in Ni-72
Authors: Sawicka, M ×
Grzywacz, R
Matea, I
Grawe, H
Pfützner, M
Daugas, JM
Lewitowicz, M
Balabanski, DL
Becker, Frank
Bélier, G
Bingham, C
Borcea, C
Bouchez, E
Buta, A
La Commara, M
Dragulescu, E
de France, G
Georgiev, G
Giovinazzo, J
Górska, M
Hammache, F
Hass, M
Hellström, M
Ibrahim, F
Janas, Z
Mach, H
Mayet, Pascale
Méot, V
Negoita, F
Neyens, Gerda
de Oliveira Santos, F
Page, RD
Perru, O
Podolyák, Z
Roig, O
Rykaczewski, KP
Saint-Laurent, MG
Sauvestre, JE
Sorlin, O
Stanoiu, M
Stefan, I
Stodel, C
Theisen, C
Verney, D
Zylicz, J #
Issue Date: Oct-2003
Publisher: American physical soc
Series Title: Physical Review C vol:68 pages:1-6
Article number: 044304
Abstract: The yrast J(pi)=8(+) states in neutron-rich Ni-70,Ni-72,Ni-74,Ni-76 nuclei are predicted to be isomeric. The present paper describes two GANIL experiments. In the first of them a search was made for the 8(+) isomeric states in Ni-72,Ni-74 nuclei via fragmentation of Ge-76 using the ion gamma-decay correlation technique. Although these states were not observed, limits for their lifetimes were determined. In the second experiment the decay spectroscopy of Co-70,Co-72 nuclei was performed using fragmentation of a Kr-86(36+) beam and the new LISE2000 spectrometer. The beta delayed gamma rays from the decay of Co-70,Co-72 to Ni-70,Ni-72 were observed using the EXOGAM germanium detectors. The half life of Co-72 was measured to be 62(3) ms and the level sequence of the lowest excited states in Ni-72 was suggested, with the 2(+) state at 1096 keV. An attempt to reproduce the level scheme in terms of shell-model calculations was undertaken. The reasons for the disappearance of the 8(+) isomer in Ni-72 are discussed.
ISSN: 0556-2813
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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