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Static fission properties of actinide nuclei

机译:神光细胞核静态裂变性能

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摘要

Fission barriers heights and excitation energies of superdeformed isomeric minima are calculated within the microscopic-macroscopic Woods-Saxon model for 75 actinide nuclei for which the experimental data are known. State-of-the-art methods were used: minimization over many deformation parameters for minima and the imaginary water flow on a many-deformation energy grid for saddles, including nonaxial and reflection-asymmetric shapes. We obtain 0.82-0.94 MeV rms deviation between the calculated and experimental barriers and 0.53 MeV rms error in the excitation of superdeformed minima Experimental vs theory discrepancies seem to be of various natures and not easy to eliminate, especially if one cares about more than one or two observables. As an example, we show that by strengthening pairing in odd systems one can partially improve agreement in barriers, while spoiling it for masses. We also discuss the "thorium anomaly" and suggest its possible relation to a different way in which the Ac and Th barriers are derived from experimental data.
机译:在微观 - 宏观树木 - 撒克逊模型中计算出75个神奇核的微观型异构体最小值的裂变屏障高度和激发能量。使用最先进的方法:最小化在许多变形参数上,以进行最小变形参数和用于鞍座的许多变形能量网格上的假想水流,包括非轴和反射非对称形状。我们在计算和实验屏障之间获得0.82-0.94 mev偏差,在超级形态的最小值的激励激发中获得0.53 mev rms误差差异差异似乎是各种各样的自然,并不容易消除,特别是如果一个人关心超过一个或一个两个可观察品。作为一个例子,我们表明,通过加强奇数系统中的配对,可以部分地改善障碍的协议,同时破坏群众。我们还讨论了“钍异常”,并建议其可能与不同方式相关的关系,其中AC和TH障碍来自实验数据。

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