Phys.Rev. C 104, L011301 (2021)

Md.S.R.Laskar, R.Palit, E.Ideguchi, T.Inakura, S.N.Mishra, F.S.Babra, S.Bhattacharya, D.Choudhury, B.Das, B.Das, P.Dey, U.Garg, A.K.Jain, A.Kundu, D.Kumar, D.Negi, S.C.Pancholi, S.Rajbanshi, S.Sihotra

Enhanced B(E3) strength observed in ¹³⁷La

NUCLEAR REACTIONS ¹³⁰Te(¹¹B, 4n)¹³⁷La, E=40 MeV; measured Eγ, Iγ, γγ-coin, level half-life by γγ(t) using an array of 11 Compton-suppressed HPGe clover and 14 LaBr₃(Ce) detectors at the Pelletron Linac Facility of TIFR-Mumbai. ¹³⁷La; deduced levels, J, π, half-life of 1005, 11/2- level, B(E3), sudden increase of B(E3) strength at N=80. Comparison with random-phase approximation (RPA) calculations. Systematics of B(E3) strengths in ^129,133La and ^{132,134,136,138}Ba.

doi: 10.1103/PhysRevC.104.L011301