  High-spin states in 84Rb are studied by using the 70Zn(18O, p3n)84Rb reaction
at a beam energy of 75 MeV. Three high-lying negative-parity bands are
established, whose level spacings are very regular, i.e., there is no signature
splitting. The dipole character of the transitions of these three bands is
assigned by the gamma-gamma directional correlations of oriented states (DCO)
intensity ratios and the multipolarity M1 is suggested by analogy with
multiparticle excitations in neighboring nuclei. Strong M1 and weak or no E2
transitions are observed. All these characteristic features show they are
magnetic rotational bands.
