Abstract
Neutron-rich isotopes of Pd (Z = 46) and Ag (Z = 47) have attracted considerable interest in terms of the evolution of the N = 82 shell closure and its influence on the r-process nucleosynthesis. Such previously unreachable exotic nuclides have become accessible by means of in-flight fission of a high-intensity 238U beam available at a new-generation radioactive isotope (RI) beam facility, the RI Beam Factory (RIBF) in RIKEN Nishina Center. In this report, recent spectroscopic results of Pd and Ag isotopes obtained as part of the EURICA (EUROBALL-RIKEN Cluster Array) project at RIBF are presented.
Highlights
The shell structures of atomic nuclei are nowadays known to change with the variation of the proton or neutron number, due predominantly to the monopole part of the protonneutron interaction that includes the central and tensor forces [1]
Emphasized is that delayed γ-ray measurements following isomeric decays can provide a powerful tool for investigating the excited level structure, in particular, when the nucleus of interest lies at the boundaries of availability for spectroscopic studies
In addition to the previously reported transitions that are involved in the decay sequences from the Jπ = (17/2−) isomeric states [19], a number of new γ rays have been observed in prompt coincidence with β rays
Summary
The shell structures of atomic nuclei are nowadays known to change with the variation of the proton or neutron number, due predominantly to the monopole part of the protonneutron interaction that includes the central and tensor forces [1].
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