Abstract
The decay of124Ba to the levels of odd-odd124Cs has been studied with on-line mass-separated sources delivered at the Isocele facility. The energy level scheme has been established fromγ-ray singles,γ−γ−t coincidence ande−γ−t coincidence spectra. Spin and parity of several low-lying levels have been assigned on the basis of internal conversion coefficient measurements andβ-branchings. A completely new level pattern including approximately 50 levels and 180γ-rays is proposed for124Cs. Several features of this level scheme are discussed and compared to those of neighbouring isotopes.
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We are indebted to many colleagues of the Isocele collaboration for their valuable help and assistance during the experiments.