Interaction cross sections (${\sigma }_{\mathrm{I}}$) of ${}^{72,76,80}\mathrm{Kr}$ on a C target were measured at the projectile fragment separator FRS at GSI. Effective matter radii of the nuclei were deduced by a Glauber model analysis so as to reproduce the experimental ${\sigma }_{\mathrm{I}}$. An increase of matter radii toward the proton drip-line is observed. We compare the extracted radii to theoretical predictions, which are based on Skyrme-Hartree-Fock-Bogoliubov (SHFB) and on relativistic mean field (RMF) approaches. The enhancement of the matter radius observed in ${}^{72}\mathrm{Kr}$ is discussed.

• Received 18 December 2007

DOI:https://doi.org/10.1103/PhysRevC.77.034315