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arXiv 1403.3205nucl-th
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低能弹性$α+ α$散射的折叠模型研究

Folding model study of the elastic $α+ α$ scattering at low energies

Ngo Hai Tan, Nguyen Hoang Phuc, Dao T. Khoa

摘要:

使用经过充分测试的M3 Y相互作用的密度相关版本和$^4$ He密度的现实选择,对入射能量低于34.7 MeV反应阈值(在实验室系统中)的弹性$α+ α$散射进行了折叠模型分析。由于吸收在低于反应阈值的能量下可以忽略不计,因此我们能够在低能量下非常明确地探测$α+ α$光学势,并发现用于构建M3 Y相互作用的密度依赖性的$α+ α$重叠密度被Pauli阻塞强烈扭曲。这一结果给出了可能的解释长期以来的不一致的双折叠模型在其研究的弹性$α+ α$和$α$ -核散射在低能量使用相同的现实密度相关的M3 Y相互作用。

英文摘要:

The folding model analysis of the elastic $α+ α$ scattering at the incident energies below the reaction threshold of 34.7 MeV (in the lab system) has been done using the well-tested density dependent versions of the M3Y interaction and realistic choices for the $^4$He density. Because the absorption is negligible at the energies below the reaction threshold, we were able to probe the $α+ α$ optical potential at low energies quite unambiguously and found that the $α+ α$ overlap density used to construct the density dependence of the M3Y interaction is strongly distorted by the Pauli blocking. This result gives possible explanation of a long-standing inconsistency of the double-folding model in its study of the elastic $α+ α$ and $α$-nucleus scattering at low energies using the same realistic density dependent M3Y 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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