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arXiv 1001.3965nucl-th
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自旋翻转M1巨共振对Skyrme力的挑战

Spin-flip M1 giant resonance as a challenge for Skyrme forces

V. O. Nesterenko, J. Kvasil, P. Vesely, W. Kleinig, P. -G. Reinhard, V. Yu. Ponomarev

摘要:

尽管Skyrme平均场方法在探索核动力学方面取得了巨大的成功,但在描述自旋翻转M1巨共振时似乎失败了。不同的Skyrme参数化的结果是矛盾的,符合实验。特别是,目前还没有同时描述双幻核M1强度的单峰结构和重形变核M1强度的双峰结构的参数化方法。这种不匹配的原因可能在于自旋相关和自旋轨道相互作用的处理不令人满意。我们讨论了这个问题的现状和可能的解决办法。特别是,我们检查i)集体位移和自旋轨道分裂的相互作用,ii)等矢量M1响应与等自旋混合响应,以及iii)张量和等矢量自旋轨道相互作用的作用。

英文摘要:

Despite a great success of the Skyrme mean-field approach in exploration of nuclear dynamics, it seems to fail in description of the spin-flip M1 giant resonance. The results for different Skyrme parameterizations are contradictory and poorly agree with experiment. In particular, there is no parameterization which simultaneously describes the one-peak gross structure of M1 strength in doubly magic nuclei and two-peak structure in heavy deformed nuclei. The reason of this mismatch could lie in an unsatisfactory treatment of spin correlations and spin-orbit interaction. We discuss the present status of the problem and possible ways of its solution. In particular, we inspect i) the interplay of the collective shift and spin-orbit splitting, ii) the isovector M1 response versus isospin-mixed responses, and iii) the role of tensor and isovector spin-orbit interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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