Centrifugal stretching from lifetime measurements in the 170 Hf ground state band

Abstract

Centrifugal stretching in the deformed rare-earth nucleus 170Hf is investigated using high-precision lifetime measurements, performed with the New Yale Plunger Device at Wright Nuclear Structure Laboratory, Yale University. Excited states were populated in the fusion-evaporation reaction 124Sn(50Ti,4n)170Hf at a beam energy of 195 MeV. Recoil distance doppler shift data were recorded for the ground state band through the J=16+ level. The measured B(E2) values and transition quadrupole moments improve on existing data and show increasing ? deformation in the ground state band of 170Hf. The results are compared to descriptions by a rigid rotor and by the confined ?-soft rotor model. � 2013 American Physical Society. Show more