Precise reaction cross sections (σR) for Mg24-38 on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The σR for Mg36-38 have been measured for the first time. An enhancement of σR compared to the systematics for spherical stable nuclei has been observed, especially in the neutron-rich region, which reflects the deformation of those isotopes. In the vicinity of the drip line the σR for Mg37 is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of σR for Mg37 should come from the p-orbital halo formation breaking the N=28 shell gap.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics