124Ba decay to the 55124Cs69 low-spin levels

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