Thermal-neutron-capture studies on 135Ba

Abstract

The nucleus 135Ba has been studied via primary, secondary γ-rays, γγ coincidences following thermal-neutron capture. A level scheme was established up to 3.7 MeV consisting of 41 levels including 114 γ-transitions. The neutron binding energy was determined to be 6971.78(17) keV. The total thermal cross section and isomer production of the 11 2 − state were determined to be σ(tot) = 1.4(4) and σ( 135Ba) = 0.11(2) barn. The level energies, E2 and M1 transitions and electromagnetic moments were compared with model predictions of the interacting boson-fermion model (IBFM).