Phys.Rev. C 90, 041303 (2014)

K.Moran, E.A.McCutchan, C.J.Lister, S.Zhu, M.P.Carpenter, P.Chowdhury, J.P.Greene, T.Lauritsen, E.Merchan, R.Shearman

E5 decay from the J^π = 11/2^- isomer in ¹³⁷Ba

RADIOACTIVITY ¹³⁷Cs(β^-); measured Eγ, Iγ, γγ-coin using Gammasphere array. ¹³⁷Ba; deduced levels, new 378-keV E5 decay, branching ratio, B(E5). Relevance to ``two-photon" second-order electromagnetic decay. Systematics of B(E5) values throughout the nuclear chart.

doi: 10.1103/PhysRevC.90.041303