Decay of a three-quasiparticle isomer in the neutron-rich nucleus 183Ta
1 Department of Nuclear Physics, The Australian National University, ACT 0200, Australia.
2 Argonne National Laboratory, Argonne, Illinois 60439, USA
3 University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
Excited states in neutron-rich tantalum isotopes have been studied with deep-inelastic reactions using 136Xe ions incident on a 186W target. New transitions observed below the τ=1.3 μs isomer in 183Ta have enabled the establishment of its energy and put limits on the spin and parity. On the basis of the reduced hindrances for the depopulating transitions, a 3-quasiparticle configuration of ν1/2−11/2+ ⊗ π9/2− is suggested.
© Owned by the authors, published by EDP Sciences, 2012