Phys.Rev. C 101, 044311 (2020)

J.Ha, T.Sumikama, F.Browne, N.Hinohara, A.M.Bruce, S.Choi, I.Nishizuka, S.Nishimura, P.Doornenbal, G.Lorusso, P.-A.Soderstrom, H.Watanabe, R.Daido, Z.Patel, S.Rice, L.Sinclair, J.Wu, Z.Y.Xu, A.Yagi, H.Baba, N.Chiga, R.Carroll, F.Didierjean, Y.Fang, N.Fukuda, G.Gey, E.Ideguchi, N.Inabe, T.Isobe, D.Kameda, I.Kojouharov, N.Kurz, T.Kubo, S.Lalkovski, Z.Li, R.Lozeva, H.Nishibata, A.Odahara, Zs.Podolyak, P.H.Regan, O.J.Roberts, H.Sakurai, H.Schaffner, G.S.Simpson, H.Suzuki, H.Takeda, M.Tanaka, J.Taprogge, V.Werner, O.Wieland

Shape evolution of neutron-rich ^{106, 108, 110}Mo isotopes in the triaxial degree of freedom

RADIOACTIVITY ^106,108,110Nb, ^106,108,110Zr(β^-); ^108,110Nb(β^-n)[from ⁹Be(²³⁸U, F), E=345 MeV/nucleon, followed by separation of ions using BigRIPS fragment separator and transported through the ZeroDegree spectrometer at RIBF-RIKEN facility]; measured Eγ, Iγ, β^-, β^-γγ-coin, and half-lives of decays of ¹⁰⁶Nb, ¹⁰⁸Nb, ¹¹⁰Nb and ¹¹⁰Zr from β-delayed γ-decay curves, half-lives of the first 2+ states in ¹⁰⁶Mo, ¹⁰⁸Mo and ¹¹⁰Mo using WAS3ABi system for ion and β^- detection, EURICA array for γ detection, and fast-timing array for level half-lives. ^106,108,110Mo; deduced levels, J, π, bands, configurations, β feedings, logft, B(E2) ratios, quadrupole deformation, kinematic moment of inertia for the ground bands, staggering pattern. ^108,110Nb; deduced %β^-n or P_n from the β-delayed γ rays emitted from the daughter nuclei, two β-decaying states or an isomer in ¹¹⁰Nb. ^106,108,110Nb; deduced J, π; discussed Nilsson configurations. Comparison with theoretical calculations. Systematics of E(4+)/E(first 2+) ratios in N(even)=56-72, Zr, Mo, Ru and Pd isotopes, and level energy staggering pattern relative to the first 2+ states in N=64, 66, 68 Mo, Ru, and Pd isotopes.

NUCLEAR STRUCTURE ^106,108,110Mo; calculated levels, J, π, potential-energy surface (PES) contours and the collective-wave functions for low-lying positive-parity states. Comparison with beyond-meanfield calculations using the constrained Hartree-Fock-Bogoliubov and local quasiparticle-random-phase approximation with SLy5+T interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.101.044311