Phys.Rev. C 100, 044324 (2019)

S.N.T.Majola, Z.Shi, B.Y.Song, Z.P.Li, S.Q.Zhang, R.A.Bark, J.F.Sharpey-Schafer, D.G.Aschman, S.P.Bvumbi, T.D.Bucher, D.M.Cullen, T.S.Dinoko, J.E.Easton, N.Erasmus, P.T.Greenlees, D.J.Hartley, J.Hirvonen, A.Korichi, U.Jakobsson, P.Jones, S.Jongile, R.Julin, S.Juutinen, S.Ketelhut, B.V.Kheswa, N.A.Khumalo, E.A.Lawrie, J.J.Lawrie, R.Lindsay, T.E.Madiba, L.Makhathini, S.M.Maliage, B.Maqabuka, K.L.Malatji, P.L.Masiteng, P.I.Mashita, L.Mdletshe, A.Minkova, L.Msebi, S.M.Mullins, J.Ndayishimye, D.Negi, A.Netshiya, R.Newman, S.S.Ntshangase, R.Ntshodu, B.M.Nyako, P.Papka, P.Peura, P.Rahkila, L.L.Riedinger, M.A.Riley, D.G.Roux, P.Ruotsalainen, J.J.Saren, C.Scholey, O.Shirinda, M.A.Sithole, J.Sorri, M.Stankiewicz, S.Stolze, J.Timar, J.Uusitalo, P.A.Vymers, M.Wiedeking, G.L.Zimba

β and γ bands in N=88, 90, and 92 isotones investigated with a five-dimensional collective Hamiltonian based on covariant density functional theory: Vibrations, shape coexistence, and superdeformation

NUCLEAR REACTIONS ¹³⁶Xe(¹⁸O, 4n)¹⁵⁰Sm, E=75 MeV; ¹⁴⁸Nd(α, 2n)¹⁵⁰Sm, E=25 MeV; ¹⁵²Sm(α, 4n)¹⁵²Gd, E=45 MeV; ¹⁵²Sm(α, 2n)¹⁵⁴Gd, E=25 MeV; ¹⁵⁵Gd(³He, 4n)¹⁵⁴Dy, E=37.5 MeV; ¹⁴⁷Sm(¹²C, 3n)¹⁵⁶Er, E=65 MeV; ¹⁵⁵Gd(α, 3n)¹⁵⁶Dy, E=25 MeV; ¹⁴⁴Sm(¹⁸O, 4n)¹⁵⁸Yb, E=78 MeV; ¹⁵⁰Sm(¹²C, 4n)¹⁵⁸Er, E=65 MeV; ¹⁵⁶Gd(α, 2n)¹⁵⁸Dy, E=27 MeV; ¹⁴⁷Sm(¹⁶O, 3n)¹⁶⁰Yb, E=73 MeV; ¹⁵²Sm(¹²C, 4n)¹⁶⁰Er, E=64 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the AFRODITE array at the cyclotron facility of the iThemba Labs for 11 reactions, and JUROGAM II array at Jyvaskyla for ¹⁴⁸Nd(α, 2n)¹⁵⁰Sm and ¹⁵⁵Gd(α, 3n)¹⁵⁶Dy reactions. ¹⁵⁰Sm, ^152,154Gd, ^154,156,158Dy, ^156,160Er, ^158,160Yb; deduced levels, J, π, multipolarities, β, γ and 0+ bands, B(E2) ratios. ^150,152,154Sm, ^152,154,156Gd, ^154,156,158Dy, ^156,158,160Er, ^158,160,162Yb; calculated potential energy surfaces (PES) and probability density distribution contours in (β, γ) plane; deduced staggering parameters, in-band B(E2) values, absolute transition strengths of E0 transitions, X(E0/E2) values from present and previous experimental data. Comparison with 5DCH-CDFT calculations with PC-PK1 density functional.

doi: 10.1103/PhysRevC.100.044324