Evolution of deformations in medium-mass nuclei
نویسندگان
چکیده
Evolution of quadrupole deformations in sd and pf shell nuclei with mass A= 18∼56 is studied by using deformed Skyrme Hartree-Fock (HF) model with pairing correlations. We point out that the quadrupole deformations of the nuclei with the isospin T=0 and T=1 show strong mass number dependence as a clear manifestation of dynamical evolution of deformation in nuclear many-body systems. The competition between the deformation driving particle-vibration coupling and the closed shell structure is shown in a systematic study of the ratios between the proton and neutron deformations in nuclei with T=|Tz|=1. Calculated quadrupole and hexadecapole deformations are compared with shell model results and available experimental data. A relation between the skin thickness and the intrinsic Q2 moments is also discussed. PACS numbers: 21.10.Ky, 21.60.Cs, 21.60.Jz, 23.20.-g ∗ present address: Department of Physics, Xiamen University, Xiamen 361005, P. R. China † On leave from China Institute of Atomic Energy , Beijing, China
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