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

作者：Smith M K^*; Werner V; Terry J R; Pietralla N; Petkov P; Berant Z; Casperson R J; Heinz A; Henning G; Luettke R; Qian J; Shoraka B; Rainovski G; Williams E; Winkler R

来源：Physical Review C, 2013, 87(4): 044317.

DOI：10.1103/PhysRevC.87.044317

Centrifugal stretching in the deformed rare-earth nucleus Hf-170 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 Sn-124(Ti-50,4n)Hf-170 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 beta deformation in the ground state band of Hf-170. The results are compared to descriptions by a rigid rotor and by the confined beta-soft rotor model. DOI: 10.1103/PhysRevC.87.044317

• 出版日期2013-4-11