Ground-state configuration of neutron-rich Aluminum isotopes through Coulomb breakup

Neutron-rich Al-34,Al-35 isotopes have been studied through Coulomb excitation using LAND-FRS setup at GSI, Darmstadt. The method of invariant mass analysis has been used to reconstruct the excitation energy of the nucleus prior to decay. Comparison of experimental CD cross-section with direct breakup model calculation with neutron in p(3/2) orbital favours Al-34(g.s)circle times v(p3/2) as ground state configuration of Al-35. But ground state configuration of Al-34 is complicated as evident from gamma-ray spectra of Al-33 after Coulomb breakup of Al-34.