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arXiv 1907.07902nucl-th
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用张量阻塞机制理解丰中子核中的幻数

Understanding Magic Numbers in Neutron-Rich Nuclei by Tensor Blocking Mechanism

I. Tanihata, H. Toki, S. Terashima, H. -J. Ong

摘要:

本文提出了一种新的包含张量相互作用阻塞效应的原子核结构模型。最近在丰中子核中发现的幻数(N=6,14,16,32和34)都可以用阻塞效应来解释。张量相互作用产生的高动量关联核子对获得了大量的结合能。这种张量关联强烈地依赖于可用于将核子激发到2 p-2 h态的位形空间。当额外的中子占据一个新的轨道时,先前可用的组态可能会丢失,导致结合能的突然损失,否则将通过2 p-2 h激发获得。这种张量阻塞效应在所有观测到的新幻数处都扩大了能隙。张量阻塞也一致地解释了在壳层边界处观察到的富中子核的特殊构型。

英文摘要:

A new paradigm for nuclear structure that includes blocking effects of tensor interactions is proposed. All of the recently discovered magic numbers (N=6, 14, 16, 32 and 34) in neutron-rich nuclei can be explained by the blocking effects. A large amount of binding energy is gained by high-momentum correlated pairs of nucleons produced by the tensor interaction. Such tensor correlations strongly depend on the configuration space available for exciting nucleons to 2p-2h states. When additional neutrons occupy a new orbital, the previously available configuration may be lost, resulting in a sudden loss of binding energy otherwise gained by the 2p-2h excitations. Such tensor blocking effects enlarge the energy gaps at all observed new magic numbers. Tensor blocking also explains consistently the observed peculiar configurations of neutron-rich nuclei at the borders of shells.

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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