The yrast level schemes of three neutron deficient nuclei with mass A≈95 have been studied with the reaction 58Ni+40Ca at 135 MeV, using the GASP γ-ray array, the ISIS silicon ball, and the n-ring neutron detector. Excited levels, including a (23/2+) spin-gap isomer, are reported for the first time in the heaviest N=Z+1 nucleus experimentally investigated, 95Ag. In 95Pd, the yrast line above the ground state has been observed and connected to states above the known isomeric level 21/2+, showing for the first time that this is indeed a spin-gap isomer. In 94Pd, the 95.6-keV isomeric transition was confirmed, and its E2 character was firmly established. The experimental observations are compared with current shell-model calculations.
Yrast isomers in 95Ag, 95Pd, and 94Pd
LUNARDI, SANTO;LENZI, SILVIA MONICA;PAVAN, PIETRO;
2003
Abstract
The yrast level schemes of three neutron deficient nuclei with mass A≈95 have been studied with the reaction 58Ni+40Ca at 135 MeV, using the GASP γ-ray array, the ISIS silicon ball, and the n-ring neutron detector. Excited levels, including a (23/2+) spin-gap isomer, are reported for the first time in the heaviest N=Z+1 nucleus experimentally investigated, 95Ag. In 95Pd, the yrast line above the ground state has been observed and connected to states above the known isomeric level 21/2+, showing for the first time that this is indeed a spin-gap isomer. In 94Pd, the 95.6-keV isomeric transition was confirmed, and its E2 character was firmly established. The experimental observations are compared with current shell-model calculations.Pubblicazioni consigliate
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