https://doi.org/10.1140/epja/i2004-10235-1
Original Article
Relativistic mean-field study for Zn isotopes
1
Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, PRC
2
Department of Physics, Nanjing University, 210093, Nanjing, PRC
3
Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, 730000, Lanzhou, PRC
* e-mail: jiangwz@sinap.ac.cn
Received:
17
November
2004
Accepted:
19
April
2005
Published online:
6
June
2005
The ground-state properties of Zn isotopes have been investigated using the deformed relativistic mean-field (RMF) theory with the NL-SH and TM1 forces. The π-meson and the spatial component of the ω-meson are taken into account. Shell effects in nuclear sizes and neutron skins are well described. Strong deformations are found for most of Zn isotopes. The shape coexistence of prolate-oblate types exists for a high portion of Zn isotopes. The occurrence of the superdeformed minimum in even isotopes is discussed. The π-meson contribution in ground-state properties of odd Zn isotopes is very limited, whereas the spatial component of the ω-meson that couples to the nonzero vector current in deformed odd nuclei gives rise to the degeneracy breaking of the level with opposite spin projections, playing the role of anti-pairing. The anti-pairing role in odd nuclei and pairing correlations with the Bardeen-Cooper-Schrieffer description in even nuclei are important to give the odd-even difference in charge radii, the prediction of the proton drip line, and possible abundance of the halo structure for neutron-rich isotopes.
PACS: 21.10.Dr Binding energies and masses – / 21.60.-n Nuclear-structure models and methods – / 27.50.+e 59 ⩽ A ⩽ 89 –
© Società Italiana di Fisica and Springer-Verlag, 2005
