The unbound excited states of the most neutron-rich dripline oxygen isotope, 24O, have been investigated by using the 24O(p,p′)24O&z. ast; reaction at the beam energy of 62 MeV/nucleon in inverse kinematics. The first and second unbound excited states of 24O have been observed at Ex =4.63-0.140.30 MeV and Ex =4.63-0.190.24 MeV (preliminary) along with the evidence for another higher lying state at around 7. 3 MeV. The quadrupole deformation parameter β2+ was deduced to be Ex =4.63-0.140.30 (preliminary) for the first time. The systematics of the β2+ and the Ex 21+ in the Z = 8 isotopes shows the N = 16 spherical shell closure in 24O.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics