Isospin Mixing in the Isobaric Analog State Derived from the ( p,nIASp̃) Reaction on 140Ce, 172,174,176Yb, and 208Pb
Isospin Mixing in the Isobaric Analog State Derived from the ( p,nIASp̃) Reaction on 140Ce, 172,174,176Yb, and 208Pb
复制标题
140Ce、172,174,176Yb 和 208Pb 上的 (p,nIASp̃) 反应衍生的同位旋模拟状态下的同位旋混合
DOI：
10.1103/physrevlett.81.3607
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发表时间：
1998
影响因子：
8.6
通讯作者：
H. Ohnuma
中科院分区：
文献类型：
--
作者：
H. Orihara;C. Yun;A. Terakawa;K. Itoh;A. Yamamoto;K. Kawami;Hiroshi Suzuki;Y. Mizuno;H. Kamurai;Y. Tajima;K. Ishii;Y. Fujii;H. Sagawa;Tohru S. Suzuki;H. Ohnuma
首次利用（p，nIAS p）反应对140 Ce，172，174，176 Yb和208 Pb进行了排他符合实验，测量了来自同量异位素类似态（IAS）的衰变质子. IAS的扩展宽度是从逃逸宽度和总宽度推导出来的。结果表明，这种强的同位旋依赖性可以用同位旋混合效应来解释，这种效应是由于子核中等矢量π态的三个多重态T= T0 − 1，T0和T0 + 1与T0分量的耦合引起的.经验的同位旋混合概率被发现是一致的微观求和规则的预测。
An exclusive coincidence experiment using the (p, n IAS p ̃) reaction on 140 Ce, 1 7 2, 1 7 4, 1 7 6 Yb, and 208 Pb was carried out for the first time by measuring decay protons from the isobaric analog states (IAS). Spreading widths of the IAS are deduced from the escape and total widths. The results show a strong isospin dependence which can be explained by the isospin mixing effect due to the coupling to the T 0 component among three multiplets T= T 0− 1, T 0, and T 0+ 1 of isovector monopole states in daughter nuclei. Empirical isospin mixing probabilities are found to be consistent with microscopic sum rule predictions.