Speaker
Description
While new magic numbers for N = 32 and 34 have been established in the Ca isotopes, some evidence of deformation and complex particle-hole configurations have been found in nuclei approaching the N = 40 Island of Inversion. To establish these structural changes the information on the isotopic chains of Sc and Ti and the isotonic chains of N = 34 and 36 will be helpful.
The single-particle structure of protons and neutrons and the collective behavior of the neutron-rich $^{56,58}$Ti have been explored in an experiment at the RIBF/RIKEN in Japan. The exotic cocktail beams were produced by the projectile fragmentation and separated by the BigRIPS separator. The secondary reactions took place in the center of the newly designed HiCARI (High-Resolution Cluster Array at RIBF) for gamma-ray detection.
In this presentation, we give an overview of the experiment and the status of the analysis for the proton knockout reactions to populate $^{55,57}$Sc. Although the states in the former isotope are already known, the new preliminary data may shed some light on the collective nature, enabling lifetime measurements for the first time. In addition, we also present the first spectroscopic studies of $^{57}$Sc.
