摘要 在引入了BCS理论的相对论平均场模型框架内,通过系统研究氧同位素偶偶核的单粒子能级间隔、单粒子能级占有概率比、对作用效应和粒子数涨落,比较了14O,22O和24O三个核的中子闭壳效应,最后从理论上预言丰质子核14O有着比丰中子核22O和24O更强的中子闭壳效应. 关键词: 相对论平均场模型 / 能级间隔 / 占有概率 / 粒子数涨落 Abstract By systematically analyzing the single particle level, the single particle occupation probability near the Fermi surface, paring energy effect and the rule of nuclear particle number fluctuation of even-even nuclei of oxygen isotopes within the relativistic mean-field model with BCS theory, we compare the neutron closed shell effect of 14O,22O and 24O nuclei, and finally predict theoretically that the proton-rich 14O nucleus has stronger neutron closed shell effect than 22O and 24O nuclei. Keywords: relativistic mean-field model / energy level interval / occupation probability / particle number fluctuation 作者及机构信息 丁斌刚2, 张大立2, 鲁定辉1 (1)浙江大学近代物理中心,杭州 310027; (2)浙江湖州师范学院理学院,湖州 313000 基金项目: 国家自然科学基金(批准号:10675046)资助的课题. Authors and contacts Ding Bin-Gang2, Zhang Da-Li2, Lu Ding-Hui1 (1)浙江大学近代物理中心,杭州 310027; (2)浙江湖州师范学院理学院,湖州 313000 参考文献 [1] [1]Takaharu Otsuka, Rintaro Fujimoto, Yutaka Utsuno, Alex Brown B, Michio Honma and Takahiro Mizusaki 2001 Phys. Rev. Lett. 87 082502 [2] [2]Ding B G,Lu D H,Zhang D L 2007 Acta Phys. Sin 56 6905 (in Chinese) [丁斌刚、鲁定辉、张大立 2007 物理学报 56 6905] [3] [3]Elekes Z,Dombrádi Zs, Aoi N., Bishop S, Fülp Zs, Gibelin J, Gomi T 2006 Phys. Rev. C 74 017306 [4] [4]Stanoiu M, Azaiez F, Dombrádi Zs, Sorlin O, Brown B A,Belleguic M 2004 Phys. Rev. C 69 034312 [5] [5]Ozawa A, Kobayashi T, Suzuki T, Yoshida K, Tanihata I 2000 Phys. Rev. Lett. 84 5493 [6] [6]Becheva E, Blumenfeld Y, Khan E, Beaumel D, Daugas J M, Delaunay F 2006 Probe Phys. Rev. Lett. 96 012501 [7] [7]Brown B A, Richter W A 2005 Phys. Rev. C 72 057301 [8] [8]Brown B A 2001 Prog. Part. Nucl. Phys. 47 517 [9] [9]Gambhir Y K, Ring P, Thimet A 1990 Ann. Phys. 198 132 [10] ]Ring P, Gambhir Y K, Lalazissis D A 1997 Com. Phys. Commu. 105 77 [11] ]Lisheng Geng, Hiroshi Toki, Jie Meng 2005 Prog. Theor. Phys. 113 4 [12] ]Bohr A, Mottelson B R 1969 Nuclear Structure (New York: W. A. Benjamin Inc) 169 [13] ]Lalazissis G A,konig J,Ring P 1997 Phys. Rev. C 55 540 [14] ]Lee Suk-Joon, Fink J, Balantekin A B 1986 Phys. Rev. Lett. 57 2916 [15] ]Ding B G, Ning P Z, Zhang D L 2007 Sci. China G 37 33 (in Chinese) [丁斌刚、 宁平治、 张大立 2007 中国科学G辑 37 33] [16] ]Chen D H, Tai F, Ren Z Z 2003 HEP & NP 27 707 (in Chinese) [陈鼎汉、邰非、任中洲 2003 高能物理与核物理 27 707] [17] ]Lisheng Geng,Hiroshi Tokil, Jie Meng 2005 Prog of Theor Phys. 113 4 施引文献