I propose a new classification of coexistence nuclei that involves E2 transition matrix elements connecting the ground state, 2₁ and 2₂ (or 2₃) states. A dimensionless ratio, based only on experimental information, is defined, and most coexistence nuclei are found to lie within one of only two narrow bands of this ratio.

中文翻译：

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提议的共存核之间的新分类

我提出了共存核的新分类，其中涉及连接基态2 ₁和2 ₂（或2 ₃）状态的E2过渡矩阵元素。定义了仅基于实验信息的无量纲比率，并且发现大多数共存核位于该比率的两个窄带之一内。