对关联与原子核结合能的相关性  

The pertinence between pairing correlations and nuclear binding energy

作　　者：丁斌刚[1] 

机构地区：[1]湖州师范学院理学院,浙江湖州313000

出　　处：《辽宁师范大学学报（自然科学版）》2008年第3期290-292,共3页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10475026;10675046);浙江省自然科学基金资助项目(Y604060)

摘　　要：在考虑了BCS方法的相对论平均场理论框架内,利用NL-SH、NL-Z和NL-3参数组计算了Sn、O和C同位素链和N=28同中子素链偶偶核在不同对能隙下结合能之差随中(质)子的变化,发现幻核的结合能变化最小,即对相互作用对幻核的影响最小,从而提出了一种从理论上检验壳效应的方法,进而验证了在丰中子区N=16是一个新的幻数,并预言14O6是一个可能的双幻核.In this paper, we obtain some nuclear information by computing some nucleus＇ binding energy change due to the change of gap A within the relativistic mean field model including BCS theory. U- sing the NL-SH parameter group, we compute the binding energy difference ΔE=Ep-E0 of the Sn isotope chain and N= 28 neutron chain. Results have shown that the ΔEs are always the lowest at magic numbers N=50 and 82 in the Sn isotope chain and at magic numbers P=20 and 28 in N=28 neutron chain. It means that the pairing interaction has the smallest influence to magic number nucleus, which benefits us to discover new magic numbers. So we compute ΔE of even-even nucleus of O and C isotope chain. The results have shown： （1）at N=15, the ΔE is consistent with those of above two isotope chains, which is also consisitent with A. Ozawa＇s results; （2）for the O isotope chain at N =14, we have some confusing on affirming ^22O14 as a new magic-number nucleus because the ΔE is smaller by NL-3 and NL-SH parameter groups but larger by NL-Z set. But Ding Bin-gang et al had predicted that N= 14 was a new magic number, using particle number fluctuation method in BCS theory. The final conclusion needs further consideration; （3）for ^14O6 nucleus, the ΔE by three parameter groups are the same, while for ^16O8 nucleus, the ΔE are even smaller than that of ^28O20 nucleu.

关 键 词：相对论平均场理论 结合能 幻数 壳效应 

分 类 号：O572[理学—粒子物理与原子核物理]