MAGNETIC ROTATION IN THE SN-105 NUCLEUS

The structure of Sn-105 has been investigated through the Cr-50(Ni-58, 2pn) reaction at a beam energy of 210 MeV. In addition to an extension of the spherical level scheme a regular sequence of dipole transition s has been found. The states of the dipole band are suggested to be bu ilt on a neutron hf(11/2)(2) excitation coupled to proton particle-hol e states, which polarize the core to a slightly prolate shape. The exp erimental results are in agreement with the prediction of tilted axis cranking calculations, which satisfactorily explain the properties of the band.