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使用渐近归一化系数（ANC）方法,由转移反应数据中抽取出镜像核21Ne与21Na以及17O与17F的2S1/2同位旋相似态中最后一个核子的均方根半径,结果列于表1。21Na和17F的2S1/2单质子态的均方根半径（5.2fm和5.0fm）几乎是它们的核心半径的2倍（20Ne为2.88fm,16O为2.71fm）,因而是质子晕态。它们的镜像核21Ne及17O中的同位旋相似态可看作中子皮态,其中,最后一个中子都有1/3左右的概率（D1）超出核相互作用半径,此时,核子对均方根半径的贡献为D2。在一对镜像核中同位旋相似态半径之间的明显差异表明,中子与质子结合能
Using the Asymptotic Normalization Coefficient (ANC) method, the root-mean-square radius of the last nucleus in the 2S1 / 2 isomorphism of mirror kernels 21Ne and 21Na and 17O and 17F is extracted from the transfer reaction data, and the results are shown in Table The root mean square radii (5.2fm and 5.0fm) of the 2S1 / 2 single proton states of 1.21Na and 17F are almost twice their core radii (20Ne = 2.88fm and 160 = 2.71fm) . The isospin similarities in their mirrored nuclei 21Ne and 17o can be considered as neutron skin states, in which the probability (D1) of 1/3 of the last neutron is beyond the radius of nuclear interaction. At this moment, The contribution of the square root radius is D2. The significant difference between the isomorphic phase radii in a pair of mirror kernels indicates that the binding energies of neutrons and protons