Low-energy structure of neutron-rich Cr isotopes

The low-energy level structure of Cr-58 hag been studied following the beta decay of V-58. This parent nuclide, along with eight additional neutron-ri ch nuclei, was produced by projectile fragmentation of a Zn-70 beam and imp lanted into a double-sided silicon strip detector (DSSD). Implants were ide ntified based on DeltaE-TOF information and correlated to beta decays in th e DSSD. Beta-delayed gamma rays were monitored by an array of three Ge clov er detectors and two high purity Ge detectors. The results from these obser vations will be discussed in light of the development of quadrupole collect ivity in the even-even chromium isotopes toward the N = 40 subshell closure .