CAJ | 학술논문

利用同位旋相关的量子分子动力学模型，研究了112Sn+112Sn和124Sn+124Sn两反应系统在不同入射能量、不同碰撞参数、不同势场和不同核子-核子碰撞截面下的粒子发射特征.阐述了发射体系的同位旋对轻粒子产额比的影响.发现轻粒子产额比是同位旋的敏感观测量.另外，还发现中快度区发射的粒子有更高的丰中子程度.同时，轻粒子的比不敏感于核子-核子碰撞截面，而敏感于核态方程，这使得从轻粒子比提取同位旋相关的核态方程变成一种可能.
이용동위선상관적양자분자동역학모형，연구료112Sn+112Sn화124Sn+124Sn량반응계통재불동입사능량、불동팽당삼수、불동세장화불동핵자-핵자팽당절면하적입자발사특정.천술료발사체계적동위선대경입자산액비적영향.발현경입자산액비시동위선적민감관측량.령외，환발현중쾌도구발사적입자유경고적봉중자정도.동시，경입자적비불민감우핵자-핵자팽당절면，이민감우핵태방정，저사득종경입자비제취동위선상관적핵태방정변성일충가능.
Within the framework of an isospin-dependent quantum molecular dynamics (IQMD) model,the emission features of light particles in 112Sn+112Sn and 124Sn+124Sn are investigated at different beam energy,different impact parameter,different EOS and different nucleon-nucleon cross section.Calculations show that the ratios of light particles are consistent with the systematics of entrance channel isospin and the midrapidity region can emit more neutron-rich particles than projectiles-like rapidity.In addition,it is found that the light particle ratio is sensitive to the nuclear EOS,but not to the nucleon-nucleon cross section,which makes it possible to extract the isospin-dependent EOS.