6533b831fe1ef96bd1298e75
RESEARCH PRODUCT
On the decay of theJπ= 11/2−,T1/2= 38.9 h isomer in133Ba: search for the E5 transition and verification of the EC branch
P. GranholmP. GranholmJ. BergmanP TikkanenJouni SuhonenKjell-mikael KällmanM. NorrbyE. YdreforsJan-olof LillT. Lönnrothsubject
PhysicsNuclear and High Energy Physics21.60.-n010308 nuclear & particles physicsState (functional analysis)Intensity ratio01 natural sciences23.40.-s23.35.+g21.60.Cs0103 physical sciences23.20.-gNuclideAtomic physics010306 general physicsdescription
International audience; This paper presents a search for the competing 11/2 − → 1/2 + E5 branch to the main 11/2 − → 3/2 + M4 transition from the T 1/2 = 39 h, J π = 11/2 − isomeric state in 133 Ba. An upper limit of 1.8 * 10 −5 could be established for the E5/M4 intensity ratio. In addition a long-standing controversy in the EC-decay of the same isomer was resolved: only one EC branch to the 11/2 + state in 133 Cs was observed. The shell-model structures of the involved states in 133 Ba and 133 Cs were studied with the microscopic quasiparticle-phonon model (MQPM). Good agreement with the decay rates B(λ) was obtained. In particular, the B(M4) value is well reproduced and further only one low-lying 11/2 state could be identified in the latter nuclide, supporting the experimental results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-02 | Journal of Physics G: Nuclear and Particle Physics |