标题： 不对称核物质中巨共振的阻尼 显示英文标题

标题： Damping of giant resonances in asymmetric nuclear matter

摘要： 在动态松弛时间近似下研究了不对称核物质中的巨集体模。我们推导出一个耦合色散关系，并表明存在两种耦合来源：（i）由于不同平均场的作用，标量和矢量模式之间产生耦合；（ii）不对称物质中碰撞相互作用导致的显式新耦合。我们证明后一种耦合是除了矢量和标量模式之外产生新模的原因。 显示英文摘要

摘要： The giant collective modes in asymmetric nuclear matter are investigated within a dynamic relaxation time approximation. We derive a coupled dispersion relation and show that two sources of coupling appear: (i) a coupling of isoscalar and isovector modes due to different mean-fields acting and (ii) an explicit new coupling in asymmetric matter due to collisional interaction. We show that the latter one is responsible for a new mode arising besides isovector and isoscalar modes.