Ar同位素中的2s_(1/2)和1d_(3/2)能级反转与泡核的形成  

The 2s_(1/2) and 1d_(3/2) state level inversion and the proton bubble formation in argon isotopes

作　　者：王再军[1] 

机构地区：[1]天津职业技术师范大学理学院,天津300222

出　　处：《天津职业技术师范大学学报》2013年第2期1-4,共4页Journal of Tianjin University of Technology and Education

基　　金：国家自然科学基金项目(11275138;10675090);天津职业技术师范大科研发展学基金项目(KJYB11-3)

摘　　要：用相对论平均场理论计算了Ar同位素链丰中子偶偶核的单质子能级、质子填充概率和电荷密度分布。结果显示:当中子数N<18时,质子的2s1/2态能级低于1d3/2态能级;而当中子数N≥18时,质子的2s1/2态能级高于1d3/2态能级。这意味着在Ar同位素中可能存在质子2s1/2和1d3/2态能级反转。对电荷分布的计算进一步发现,质子2s1/2和1d3/2态能级反转会导致在Ar同位素中可能有质子半泡核的存在。The single-proton energy levels and the proton occupation probabilities are calculated with the relativistic mean field （RMF） theory. Results show that the 2S1/2 state energy level is lower than the 1d3/2 state energy level for the N〈18 isotopes and the 2Sl/2 state energy level is higher than the ld3/2 state the energy level for the N≥18 isotopes. This indicates that the 2s1/2 and 1d3/2 state energy level inversion may occur in some of the Ar isotopes. Calculations of charge density distributions further show that the level inversion may lead to the formation of semi-bubbles of proton in Ar isotopes.

关 键 词：能级反转 相对论平均场模型 电荷密度 AR同位素 泡核 

分 类 号：O571.21[理学—粒子物理与原子核物理]