Nucl.Phys. A957, 240 (2017)

P.Petkov, A.Dewald, O.Moller, I.Deloncle, R.Chapman, S.Pascu, D.Bucurescu, D.Tonev, M.Reese, C.Fransen, S.Y.Araddad, G.Asova, J.Copnell, N.Goutev, M.Hackstein, J.Jolie, J.C.Lisle, J.N.Mo, Th.Pissulla, W.Rother, A.G.Smith, C.Tenereiro, D.M.Thompson, K.O.Zell

On the quadrupole collectivity in the yrast band of ¹⁶⁸Yb

NUCLEAR REACTIONS ¹⁵⁴Sm(¹⁸O, 4n), E=80 MeV;¹²⁴Sn(⁴⁸Ca, 4n), E=189 MeV; measured Eγ, Iγ, γγ-coin, RDDS (Recoil distance Doppler-shift) spectra using five large volume Ge (Sm target) and 21 escape-suppressed HPGe (Sn target). ¹⁶⁸Yb deduced T_1/2, B(E2) of levels using lifetime analysis with differential decay curve method (one B(E2) deduced using published T_1/2), yrast band quadrupole moments; calculated B(E2) vs spin. Yrast band moments of inertia and B(E2) compared with published values for ^{164,166,168,170}Yb; deduced indication for reduced collectivity at low spin unexplained by available calculations.

doi: 10.1016/j.nuclphysa.2016.09.006