arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.03835nucl-thnucl-ex
收藏

基于KIDS模型的有限核观测量的贝叶斯推断

Bayesian inference of finite-nuclei observables based on the KIDS model

Jun Xu, Panagiota Papakonstantinou

摘要:

基于Korea-IBS-Daegu-SKKU(KIDS)模型,以$^{208}$ Pb和$^{120}$ Sn的原子核结构数据为约束条件,对Isoscope和Isovector核相互作用参数进行了贝叶斯分析.在中子皮厚度的约束下,发现引入核对称能的曲率参数$K_{sym}$作为自变量,显著加宽了斜率参数$L$的后验概率分布函数(PDF),并影响了相关关系.典型地,$L$和饱和密度下的对称能之间的负相关消失,而$L$和$K_{sym}$之间的正相关被观察到。在等密度巨共振(ISGMR)的约束下,加入偏度参数作为自变量,也显著加宽了核物质不可压缩性$K_0$的后验概率密度函数.即使在状态方程高阶参数存在大范围不确定性的情况下,也得到了$L<90$ MeV和$K_0<270$ MeV的鲁棒约束.我们的研究量化了PREXII和等矢量巨偶极共振(IVGDR)的中子皮数据对$L$的约束与$^{208}$ Pb和$^{120}$ Sn的ISGMR数据对$K_0$的约束之间的一致性。

英文摘要:

Bayesian analyses on both isoscalar and isovector nuclear interaction parameters are carried out based on the Korea-IBS-Daegu-SKKU (KIDS) model under the constraints of nuclear structure data of $^{208}$Pb and $^{120}$Sn. Under the constraint of the neutron-skin thickness, it is found that incorporating the curvature parameter $K_{sym}$ of nuclear symmetry energy as an independent variable significantly broadens the posterior probability distribution function (PDF) of the slope parameter $L$, and affects the related correlations. Typically, the anticorrelation between $L$ and the symmetry energy at saturation density disappears, while a positive correlation between $L$ and $K_{sym}$ is observed. Under the constraint of the isoscalar giant monopole resonance (ISGMR), incorporating the skewness parameter as an independent variable also significantly broadens the posterior PDF of the nuclear matter incompressibility $K_0$. Even with the broad uncertainties of higher-order parameters of the equation of state (EOS), robust constraints of $L<90$ MeV and $K_0<270$ MeV are obtained. Our study quantifies the consistency between the constraints on $L$ from the neutron-skin data of PREXII and isovector giant dipole resonance (IVGDR) data, and the constraints on $K_0$ from the data of ISGMR in $^{208}$Pb and $^{120}$Sn.

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。

↑