Phys.Rev. C 83, 014316 (2011)

D.M.Cullen, P.J.R.Mason, C.Scholey, S.Eeckhaudt, T.Grahn, P.T.Greenlees, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, A.M.Kishada, M.Leino, A.-P.Leppanen, K.Mantyniemi, P.Nieminen, M.Nyman, J.Pakarinen, P.Peura, M.G.Procter, P.Rahkila, S.V.Rigby, J.Saren, J.Sorri, J.Uusitalo, B.J.Varley, M.Venhart

Discovery of a 10 μs isomeric state in ₆₃¹³⁹Eu

NUCLEAR REACTIONS ⁹²Mo(⁵⁴Fe, 2n5p), E=305, 315 MeV; measured Eγ, Iγ, prompt and delayed γ-spectra, (recoil)γ-coin, (recoil)γ(t), isomer half-life using recoil-isomer tagging technique. ¹³⁹Eu; deduced levels, J, π, internal conversion coefficients, multipolarities, band, alignment plot, configuration, B(E1) strength. Comparison of E1 strength with those in ^128,130,132Te, ¹³¹I, ^{134,138,147,149}Pm, ¹³⁶Sm, ¹⁴⁰Eu, ¹³⁸Gd, ¹⁴²Tb, ^140,148Dy, ¹⁴⁴Ho.

doi: 10.1103/PhysRevC.83.014316