Level structure of [sup.164]Dy from the

By employing a beam of reactor fast neutrons, gamma-ray spectra and angular distributions of gamma rays with respect to the neutron-beam axis were measured in the reaction [sup.164]Dy (n, n'[gamma]). The scheme of levels and gamma transitions in [sup.164]Dy was composed on the basis of data published earlier and new levels, rotational bands, gamma transitions, and multipole-mixing parameters. It is concluded that the scheme of J = 0-4 levels is complete up to the excitation energy of 1.95 MeV The commonly accepted rule in constructing [K.sup.[pi].sub.n] = [0.sup.+.sub.2] and [1.sup.+.sub.1] rotational bands is found to be violated. The nature of the [2.sup.+] level at the energy of 1796.68 keV is discussed.