From a Bayesian analysis of the electric dipole polarizability, the constrained energy of isovector giant dipole resonance, the peak energy of isocalar giant quadrupole resonance, and the constrained energy of isocalar giant monopole resonance in ²⁰⁸Pb, we extract the isoscalar and isovector effective masses in nuclear matter at saturation density as and , respectively, at 90% confidence level. The constraints obtained on and lead to a positive isospin splitting of nucleon effective mass in asymmetric nuclear matter of isospin asymmetry at as . In addition, the symmetry energy at the subsaturation density is determined to be MeV at 90% confidence level.

通过对 208 Pb中的电偶极极化率、等向量巨偶极共振的约束能量、等标巨四极共振的峰值能量和等尺度巨单极共振的约束能量进行贝叶斯分析，我们提取了²⁰⁸ Pb 中的等标量和等向量有效质量。核物质饱和密度分别为和，置信水平为 90%。在等旋不对称的不对称核物质中，在as处获得并导致核子有效质量的正等旋分裂的约束。此外，在 90% 的置信水平下，亚饱和密度处的对称能量被确定为MeV。