Probing the shell structure near 54Ca and 100Sn

Abstract

In this contribution results will be reported from two recent experiments at the GSI Fragmentseparator (FRS). The first experiment is using one-nucleon knockout with relativistic fragments from a 500AMeV 86Kr primary beam to probe the single-particle structure in 49Ca and 55Ti. From the one-neutron knockout in the neutron-rich nuclei 50Ca and the N=34 nucleus 56Ti cross sections and momentum distributions were deduced allowing the determination of angular momentum values and spectroscopic factors for individual states. In the second experiment decay spectroscopy of 100Sn and nuclei in its vicinity was performed. The nuclei of interest were produced using the fragmentation of a 1 AGeV 124Xe primary beam. The RISING gamma-ray detector array was used in close geometry to detect gamma-decay following isomeric as well as beta decays. Aside from the production of more that 200 100Sn nuclei, several new isotopes and isomers were discovered.