Abstract
Precise reaction cross sections () for on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The for have been measured for the first time. An enhancement of 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 for is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of for should come from the -orbital halo formation breaking the shell gap.
- Received 9 January 2014
- Revised 2 October 2014
DOI:https://doi.org/10.1103/PhysRevC.90.061305
©2014 American Physical Society