Phys.Rev. C 91, 054326 (2015)

R.Stegmann, C.Bauer, G.Rainovski, N.Pietralla, C.Stahl, S.Bonig, S.Ilieva, A.Blazhev, A.Damyanova, M.Danchev, K.Gladnishki, J.Jolie, R.Lutter, J.Pakarinen, D.Radeck, E.Rapisarda, P.Reiter, M.Scheck, B.Siebeck, T.Stora, P.Thole, T.Thomas, M.Thurauf, M.J.Vermeulen, D.Voulot, N.Warr, F.Wenander, V.Werner, H.De Witte

Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2; 2⁺₁ → 0⁺₁) value of ¹⁴²Sm

NUCLEAR REACTIONS ⁴⁸Ti, ⁹⁴Mo(¹⁴²Sm, ¹⁴²Sm'), E=405 MeV, [secondary ¹⁴²Sm beam from Ta(p, X), E=1.4 GeV from PS booster at CERN and using RILIS and GPS setup at ISOLDE-CERN]; measured Eγ, Iγ, (particle)γ-coin, γ-particle yields as function of angle using MINIBALL HPGe-detector array at REX-ISOLDE-CERN facility. Coulomb excitation technique. ¹⁴²Sm; deduced matrix elements and B(E2) for the first 2+ state in ¹⁴²Sm. Systematics of B(E2) values for first 2+ state in ¹³⁰Sn, ¹³²Te, ¹³⁴Xe, ¹³⁶Ba, ¹³⁸Ce, ¹⁴⁰Nd, ¹⁴²Sm. Comparison with shell-model calculations.

RADIOACTIVITY ¹⁴²Pm, ^142,142mEu, ¹⁴²Sm(EC), (β⁺); measured Iγ; deduced ^142mEu/¹⁴²Eu isomeric ratio, and M(¹⁴²Eu)/M(¹⁴²Sm).

doi: 10.1103/PhysRevC.91.054326