摘要
Bayesian analyses on both isoscalar and isovector nuclear interaction parameters are carried out based on and 120Sn. Under the constraint of the neutron-skin thickness, it is found that incorporating the curvature parameter Ksym of the 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 Ksym 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 K0. Even with the broad uncertainties of higher-order parameters of the equation of state (EOS), robust constraints of L < 90 MeV and K0 < 270 MeV are obtained. Our results suggest some compatibility between the ISGMR data of 208Pb and 120Sn but not of the isovector observables, especially the neutron-skin thickness.
