First decay study of the very neutron-rich isotope Br-93
arXiv:nucl-ex/0011004 · doi:10.1103/PhysRevC.63.034316
Abstract
The decay of the mass-separated, very neutron-rich isotope Br-93 has been studied by gamma-spectroscopy. A level scheme of its daughter Kr-93 has been constructed. Level energies, gamma-ray branching ratios and multipolarities suggest spins and parities which are in accord with a smooth systematics of the N=57 isotones for Z less-equal 40, suggesting the N=56 shell closure still to be effective in Kr isotopes. So far, there is no indication of a progressive onset of deformation in neutron-rich Kr isotopes.
17 pages, 3 figures, Phys. Rev. C, in print