Speaker
Dr
Riccardo Orlandi
(Japan Atomic Energy Agency, Advanced Science Research Center)
Description
Transfer reactions are a valuable tool to study the evolution of shell structure away from stability. In particular, studies of nuclei in the proximity of exotic doubly-magic nuclei like $^{78}$Ni and $^{132}$Sn are key systems to test our theoretical understanding, since the proximity of the doubly-magic core makes shell-model calculations feasible.
Single-neutron states in the Z=30, N=49 isotope $^{79}$Zn have been populated using the $^{78}$Zn(d,p)$^{79}$Zn transfer reaction in inverse kinematics at REX-ISOLDE, CERN. The experimental setup allowed the combined detection of protons ejected in the reaction, and of γrays emitted by $^{79}$Zn. From the combined analysis of γ-ray and proton data, low-lying states in $^{79}$Zn were observed and identified. Comparison with large-scale shell-model calculations permits to constrain the size of the N=50 shell gap in $^{78}$Ni.
Neutron-hole states in $^{131}$Sn were populated using the $^{132}$Sn(d,t)$^{131}$Sn reaction at the HFRIB facility at Oak Ridge National Laboratory. Measured proton differential cross sections and their impact of single-hole energies in $^{132}$Sn will also be presented.
Primary author
Dr
Riccardo Orlandi
(Japan Atomic Energy Agency, Advanced Science Research Center)
