A study of the pairing strength in the rare-earth nuclei

  • In the framework of relativistic mean-field theory, the strength of the pairing force is systematically studied for several isotope chains of rare-earth nuclei. It is shown, for the first time, that the pairing strength of the neutron, Gn, increases dramatically around the magic number N=82, while for the proton it is strongly related to the odd-even difference of the neutron number. The results indicate a strong correlation between the shell structure and the pairing force strength.
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  • [1] . GENG L S, Toki H, Sugimoto S et al. Prog. Theor. Phys.,2003, 110: 921-9362. MENG J, Tanihata I. Nucl. Phys., 1999, A650: 176|1963. Hara K, SUN Y. Int. J. Mod. Phys., 1995, E4: 6374. LI Jun-Qing, MA Zhong-Yu, CHEN Bao-Qiu. Phys. Rev.,2002, C65: 0643055. Gambhir Y K, Ring P, Thimet A. Ann. Phys., 1990, 198:1326. Ring P, Gambhir Y K, Lalazissis G A. Compu. Phys.Commu., 1997, 105: 777. CHEN Ding-Han, TAI Fei, REN Zhong-Zhou. HEP NP,2003, 27: 70(in Chinese)(陈鼎汉,邰非,任中洲.高能物理与核物理,2003,27:70) 8. LONG Wen-Hui, MENG Jie, ZHOU Shan-Gui. HEP NP,2002, 26: 823(in Chinese)(龙文辉,孟杰,周善贵.高能物理与核物理,2002, 26: 823)9. LI Jun-Qing, MA Zhong-Yu, CHEN Bao-Qiu et al. Phys.Rev., 2002, C65: 06430510. Lalazissis G A, Konig J, Ring P. Phys. Rev., 1997, C55:54011. Moeller P, Nix J R, Myers W D et al. At. Data Nucl. DataTables, 1995, 59: 18512. Bohr A, Mottelson B R. Nuclear Structure(Vol 1). Ben-jamin, New York, 1969. 16913. Audi A, Wapstra A H, Thibault C. Phys., 2003, A729: 337
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DING Bin-Gang, ZHANG Da-Li and LU Ding-Hui. A study of the pairing strength in the rare-earth nuclei[J]. Chinese Physics C, 2006, 30(7): 616-619.
DING Bin-Gang, ZHANG Da-Li and LU Ding-Hui. A study of the pairing strength in the rare-earth nuclei[J]. Chinese Physics C, 2006, 30(7): 616-619. shu
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Received: 2005-09-29
Revised: 2006-01-26
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A study of the pairing strength in the rare-earth nuclei

    Corresponding author: DING Bin-Gang,
  • School of Science, Huzhou Teachers College, Huzhou 313000, China2 Institute of Modern Physics, Zhejiang University, Hangzhou 310000, China

Abstract: In the framework of relativistic mean-field theory, the strength of the pairing force is systematically studied for several isotope chains of rare-earth nuclei. It is shown, for the first time, that the pairing strength of the neutron, Gn, increases dramatically around the magic number N=82, while for the proton it is strongly related to the odd-even difference of the neutron number. The results indicate a strong correlation between the shell structure and the pairing force strength.

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