Spectroscopy of neutron-rich Sb isotopes using AGATA, VAMOS++ and EXOGAM
Résumé
132Sn is one of the rare neutron-rich unstable nuclei, with classical doubly magic shell closures, that is experimentally accessible with the recent developments in accelerators and detectors. The study of the excited states and the transition probabilities in nuclei in its vicinity, with few particles or/and holes added to the inert core, are crucial for understanding the shell model theory and the relevant pp, pn and nn interactions in this mass A ∼ 130 region. Additionally, in this mass-region, there are presence of many seniority isomers in the range of ns to µs. When the lifetime of the isomer is of the order of µs’s, an additional challenge appears in correlating the γ-ray transition feeding and depopulating these isomers. Therefore, these nuclei are often known either from their isomer decay or from their prompt γ spectroscopy. In the present work, the prompt-delayed spectroscopy of neutronrich Sb isotopes have been carried out by utilising the unique combination of AGATA, VAMOS++ and EXOGAM detectors [1].
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