Abstract
The neutron deficient isotope79Y has been firstly identified and the decay properties were studied fromΒ-decay measurements in the reaction of54Fe(28Si,p2n at 92 MeV. Threeγ rays of 152.5, 177.4, and 1106 keV were observed concerning theΒ decay. The half life and QEC value were determined to be 14.9 ± 0.6 s and 7.12 ± 0.45 MeV, respectively. The decay scheme including spin-parity is discussed, and 5/2+ assignment for the ground state is proposed.
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We would like to thank to Dr. Y. Maeda for his valuable advice about the electroplating method of iron targets. We also thank to Mr. T. Maeda and Mr. S. Niiya for preparation of hardware for data-taking.