Level structure of light even xenon nuclei populated in the decays of isomeric and ground states of 118120122Cs

Gamma and conversion electron lines following the β-decay of 118120122Cs nuclei have been investigated at the ISOLDE facility. Evidence has been found for two isomeric states with similar half-lives in 118120Cs. Level schemes of 118120122Xe including levels of the quasi-ground state, gamma and beta bands have been established. The structure of these nuclei is discussed in the framework of the rotational model and the vibrational limit of the interacting boson approximation (IBA) approach. (Auth.)