InstituteofTheoreticalPhysics;
theChineseAcademyofSciences;
P.O.Box2735;
Beijing100080;
China;
ChinaInstituteofAtomicEnergy;
P.O.Box275(18);
Beijing102413;
ChinaCenterofTheoreticalNuclearPhysics;
NationalLaboratoryofLanzhouHeavyIonAccelerator;
Lanzhou730000;
China;
InsitutfürTheoretischePhysik;
UniversitaetFrankfurt;
Frankfurt60054;
Germany;
自由核子; 重离子碰撞; 中子-质子化学势; 对称势; 量子分子动力学;