γ -ray spectroscopy of low-lying excited states and shape competition in Os 194 | Academic Article individual record
abstract

© 2017 American Physical Society. The properties of excited states in the neutron-rich nucleus Os194 have been investigated using the Os192(O18,O16)Os194 reaction with an 80 MeV beam provided by the IFIN-HH Laboratory, Bucharest. Discrete γ-ray decays from excited states have been measured using the hybrid HPGe-LaBr3(Ce) array RoSPHERE. The current work identifies a number of previously unreported low-lying nonyrast states in Os194 as well as the first measurement of the half-life of the yrast 2+ state of 302(50) ps. This is equivalent to a B(E2:2+→0+)=45(16) W.u. and intrinsic quadrupole deformation of βeff=0.14(1). The experimental results are compared with Hartree-Fock-Bogoliubov-interacting-boson-model calculations and are consistent with a reduction in a quadrupole collectivity in Os isotopes with increasing neutron number.

author list (cited authors)
Daniel, T., Kisyov, S., Regan, P. H., Marginean, N., Podolyák, Z., Marginean, R., ... Toma, S.
publication date
2017
published in