GROUND STATE MAGNETIC PROPERTIES OF ODD NEUTRON DY ISOTOPES

Using the quasiparticle phonon nuclear model (QPNM) and taking into account the spin-spin interaction, the effects of the spin polarization on spin gyromagnetic factors (g(s)) as well as the intrinsic magnetic moments (g(K)) of the deformed odd neutron Dy155-165 isotopes were studied. The calculated values of g(s) and g(K) are in fair agreement with the experiment as well as with other microscopic calculations. Our calculations indicated that because of the core polarization, the g(s) factors of the nucleons in the nucleus reduce noticeably from its free nucleon value and the spin-spin interactions play an important role in the explanation of the quenching of the g(s) factors. A very good reproduction of the phenomenological quenching of g(s) factor from its free values (g(s)(eff) = 0.6 - 0.7g(s)(free)) is obtained for Dy155-165