Recent Result from in-beam spectroscopy at GANIL in the 68Ni vicinity
by
Emmanuel Clement(GANIL)
→
Europe/Zurich
26-1-022 (CERN)
26-1-022
CERN
Description
Excited states in a wide range of neutron rich nuclei around 68Ni have been studied using the EXOGAM array in coincidence with the VAMOS large acceptance spectrometer. The nuclei of interest were produced via multi-nucleon transfer reactions in inverse kinematics using a 238U beam at an energy of ~16% above the Coulomb barrier. The γ-rays emitted at the target point were measured with the EXOGAM array and the delayed γ-rays were measured in the focal plane of the spectrometer with four additionnal germaniums detectors. I will report first on the recent spectroscopy measurement in 68Ni and neutron-rich Co isotopes and second on lifetime measurements in the very neutron-rich Zn, Co and Fe isotopes using the plunger technique. Large scale shell model as well as QRPA calculations have been carried out and they all are consistent with the earlier Hartree-Fock-Bogoliubov predictions using the Gogny D1S effective interaction indicating a possible shape coexistence scenario involving a highly deformed state at low energy.
