Level structure of⁷⁸Rb

The excited states of78Rb have been investigated by means of in-beam andβ-γ spectroscopy. The production of78Rb and theβ radioactivity of78Sr have been made through the54Fe(28Si,3pn) and54Fe(28Si,2p2n) reactions, respectively. Four rotational bands have been observed in the high-spin band structure. The signature splitting is large in the two bands, while the other two bands have small splitting. A detailed low-lying level scheme of78Rb has been constructed for the first time via theβ decay of78Sr in order to search for a linking transition between the high-spin band head and low lying states.