124Ba Decay to the 55 124 Cs69 low-spin levels

Abstract

The decay of 124Ba to the levels of odd-odd 124Cs has been studied with on-line massseparated sources delivered at the Isocele facility. The energy level scheme has been established from y-ray singles, y-7-t coincidence and e-y -t coincidence spectra. Spin and parity of several low-lying levels have been assigned on the basis of internal conversion coefficient measurements and fl-branchings. A completely new level pattern including approximately 50 levels and 180 y-rays is proposed for 124Cs. Several features of this level scheme are discussed and compared to those of neighbouring isotopes.

β decay of the even-evenBa124nucleus: A test for the interacting boson-fermion-fermion model

“…1 where the experimental data are taken from Refs. [22,27,28]. The agreement between the experiment and the calculation is very good.…”

“…A level scheme was proposed with firm I π assignements. Several positive-parity states have been previously seen in the β + /EC radioactive decay of 124 Ba [27].…”

“…(25a)- (27). The squares of the β-decay matrix elements are (29) from which the f t value is calculated by …”

“…States at 0.253, 0.272, and 0.273 MeV observed in Ref. [27] are assigned as 1 + and their γ decays are compared to the experimental values from Ref. [27].…”

High spin structure in the odd-odd nucleus124Cs

“…A previous investigation of low spin states fed from j3-decay of ~24Ba was reported by Weiss et al [7]. In-beam results have been reported by A. Gizon et al [8].…”