Cluster model investigation of U-233

We model the odd-neutron nucleus U-233 as a Pb-208 + Ne-24+n system. The od d neutron occupies 1g(9/2), 0i(11/2), 0j(15/2), 2d(5/2), 3S(1/2), 1g(7/2) a nd 2d(3/2) states with energies taken from the known spectrum of Pb-209, wh ile the Ne-24 cluster occupies 0(+), 2(+), 4(+)...., and 1(-), 3(-), 5(-).. ., states whose energies are taken from the known levels of U-232. Th, Ne-2 4-n interaction mixes together the various combinations of neutron and Ne-2 4 orbital motion states coupled to total angular momentum I. The Pauli prin ciple is satisfied by excluding the odd neutron from orbitals above the Pb- 208 Fermi surface already occupied by neutrons in the Ne-24 cluster. We pre dict many low-lying parity doubler bands whose properties are in overall ag reement with observation. (C) 1998 Elsevier Science B.V.