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Analysis of isomeric ratios for medium-mass nuclei

机译：中质核的异构体比率分析

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摘要

Values of the isomeric ratios for product nuclei originating from simple charge-exchange reactions were analyzed. The cross sections for the formation of product nuclei in ground and isomeric states were calculated with the aid of the TALYS 1.4 and EMPIRE 3.2 codes. The calculated values of the isomeric ratios were compared with their experimental counterparts taken from the EXFOR database. For the Y-86,Y-87, Tc-94,Tc-95,Tc-96,Tc-99, and Sc-44 nuclei, the experimental values of the isomeric ratios exceed the respective calculated values. The nuclei in question feature weak deformations and have high-spin yrast lines and rotational bands. The possible reason behind the discrepancy between theoretical and experimental isomeric ratios is that the decay of yrast states leads with a high probability to the formation of isomeric states of detected product nuclei.
机译：分析了源自简单电荷交换反应的产物核的异构体比率的值。在TALYS 1.4和EMPIRE 3.2编码的帮助下，计算了处于基态和异构态的产物核形成的横截面。将同分异构体比率的计算值与从EXFOR数据库中获得的同等比率进行比较。对于Y-86，Y-87，Tc-94，Tc-95，Tc-96，Tc-99和Sc-44核，同分异构体比率的实验值超过了各自的计算值。所讨论的原子核具有微弱的变形，并具有高旋转的拉斯特谱线和旋转带。理论和实验同分异构率之间存在差异的背后可能原因是，yrast态的衰减极有可能导致检测到的产物核形成异构态。

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