The lifetimes of the first excited states of the N=30 isotones 50Ca and 51Sc have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f7/2 shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus 48Ca, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.
Lifetime Measurements of the Neutron-Rich N=30 Isotones Ca-50 and Sc-51: Orbital Dependence of Effective Charges in the fp Shell
VALIENTE DOBON JJ;MENGONI, DANIELE;LENZI, SILVIA MONICA;LUNARDI, SANTO;RECCHIA, FRANCESCO;GOTTARDO, ANDREA;MONTANARI, DANIELE;MONTAGNOLI, GIOVANNA;SCARLASSARA, FERNANDO;MAGLIONE, ENRICO;
2009
Abstract
The lifetimes of the first excited states of the N=30 isotones 50Ca and 51Sc have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f7/2 shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus 48Ca, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.File | Dimensione | Formato | |
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