Abstract
The neutron deficient nucleus82Zr has been studied through the reaction58Ni(28Si, 2p 2n)82Zr with a calculated cross section of 0.3% of the total fusion cross section atE(28Si)=128 MeV. Gamma rays from excited states of82Zr were measured and identified using the NORDBALL escape-suppression array at the Niels Bohr Institute. Reaction channel selection was performed by use of neutron and charged particle detector arrays in conjunction with the germanium detectors. A rotational band in82Zr has been identified with spins up to 20 ħ by analysis of reaction channel selectedγ-γ coincidence matrices. Band crossings were identified at frequencies 0.57 and 0.69 MeV.
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The authors are grateful to the staff of the Niels Bohr Institute, Risø, for its hospitality and for providing beams and technical support. We are especially indepted to Mr. Jørn Westergaard for operating the NBI Tandem van de Graaff and Booster accelerator system. The support from the Japanese government (grant numbers: 01044037 and 02452027) and Swedish Natural Science Research Council is greatly appreciated. The support for one of us (S.M.) from Yamada Science Foundation is also acknowledged.