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arXiv 2301.01951nucl-th
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$A=16$ 镜像核的含共振与连续谱耦合的从头计算描述

Ab initio descriptions of $A=16$ mirror nuclei with resonance and continuum coupling

S. Zhang, F. R. Xu, J. G. Li, B. S. Hu, Z. H. Cheng, N. Michel, Y. Z. Ma, Q. Yuan, Y. H. Zhang

AI总结:

利用含连续谱耦合和3NF的从头算Gamow壳模型,研究$A=16$镜像核的同位旋对称性破缺,解释能级顺序差异并揭示3NF与连续谱耦合的相互作用。

摘要:

我们利用从头算Gamow壳模型研究了$A=16$镜像核$^{16}$F、$^{16}$N、$^{16}$Ne和$^{16}$C中的同位旋对称性破缺。从包含N$^3$LO阶两核子力(2NF)和N$^2$LO阶三核子力(3NF)的手征相互作用出发,在Gamow Hartree-Fock基中采用多体微扰理论构建了复动量${\it psd}$壳哈密顿量,该基自洽地包含了束缚态、共振态和连续态。这种同时包含连续谱耦合和3NF的精细从头算Gamow壳模型能够恰当处理弱束缚核和未束缚核的多体关联。$^{16}$F和$^{16}$N的镜像伙伴在其激发谱中表现出不同的能级顺序,这可以通过在计算中纳入3NF得到很好的解释。通过深入分析其组态结构,详细研究了镜像伙伴$^{16}$Ne和$^{16}$C之间的同位旋不对称性。在弱束缚和未束缚核态中,讨论了3NF与连续谱耦合之间的相互作用。

英文摘要:

We have used an {\it ab initio} Gamow shell model to study the isospin symmetry breaking in the $A=16$ mirror nuclei of $^{16}$F, $^{16}$N, $^{16}$Ne and $^{16}$C. Starting from a chiral interaction with two-nucleon force (2NF) at N$^3$LO and three-nucleon force (3NF) at N$^2$LO, a complex-momentum ${\it psd}$-shell Hamiltonian was constructed by employing the many-body perturbation theory in the Gamow Hartree-Fock basis which includes bound, resonant and continuum states self-consistently. Such an elaborated {\it ab initio} Gamow shell model with both continuum coupling and 3NF included can properly treat the many-body correlations of weakly bound and unbound nuclei. The mirror partners of $^{16}$F and $^{16}$N exhibit different level orders in their excitation spectra, which can be well explained by the inclusion of 3NF in the calculation. The isospin asymmetry between the mirror partners $^{16}$Ne and $^{16}$C was studied in detail by insight into their configuration structures. The interplay between 3NF and the continuum coupling is discussed in the weakly bound and unbound nuclear states.

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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