Low Energy Structure of Even-Even Ni Isotopes Close to ⁷⁸Ni

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2005.07.006· OSTI ID:931370

Mazzocchi, C ^[1]; Grzywacz, Robert Kazimierz ^[2]; Batchelder, J C ^[3]; Bingham, Carrol R ^[2]; Fong, D ^[4]; Hamilton, J H ^[4]; Hwang, J K ^[4]; Karny, M ^[5]; Krolas, W ^[4]; Liddick, S N ^[6]; Lisetskiy, A F ^[6]; Morton, N H ^[6]; Mantica, P F ^[6]; Mueller, W F ^[6]; Rykaczewski, Krzysztof Piotr ^[2]; Steiner, M ^[6]; Stolz, A ^[6]; Winger, J A ^[7]

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1. Gesellschaft fur Schwerionenforschung (GSI), Germany
2. ORNL
3. Oak Ridge Associated Universities (ORAU)
4. Vanderbilt University
5. University of Warsaw
6. Michigan State University, East Lansing
7. Mississippi State University (MSU)

The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 A MeV {sup 86}Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the I{sup {pi}}=8{sup +}, T{sub 1/2} = 590{sup +180}{sub -110}isomer, thus establishing the 0{sup +}-2{sup +}-4{sup +}-6{sup +}-8{sup +} ground-state band in {sup 76}Ni. The previously unknown 2{sup +} and 4{sup +} levels belonging to the ground-state band in {sup 74}Ni were identified in the {beta} decay of {sup 74}Co (T{sub 1/2}=30(3) ms). The decay properties of {sup 72}Co {yields} {sup 72}Ni were verified and confirmed on the basis of {gamma}-{gamma} coincidence data. The relevance of the measured level properties for the magicity of {sup 78}Ni is analyzed with the help of advanced shell-model predictions.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931370
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Journal Issue: 1-2 Vol. 622
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
Beta decay
DECAY
ELECTRONIC STRUCTURE
EVEN-EVEN NUCLEI
GROUND STATES
Gama-ray transitions
Isomeric decay
Level energies
MAGIC NUCLEI
NICKEL ISOTOPES
NUCLEAR FRAGMENTATION