摘要
The charge-symmetry-breaking(CSB)effect in a nuclear medium that gives rise to the first-order symmetry energy in finite nuclei is discussed in detail in the present work.For heavy and superheavy nuclei with large neutron excesses,it should be nonnegligible in high-precision mass predictions,and importantly it affects the stability of these nuclei.Combined with this CSB effect,we have constrained the Coulomb energy with the mirror nuclei and then extracted the mass-dependent symmetry energy coefficient of heavy nuclei[1].Based on our previous work,we have further explored the neutron skin thickness Rnp of ^(208)Pb and the density dependence of the symmetry energy of nuclear matter.
