摘要
利用同位旋相关量子分子动力学模型,对比和研究了中子晕核19B和相等质量稳定核19F在相同入射道条件下引起核反应动量耗散中的特征.由于中子晕核的松散中子晕结构和小的分离能,与相等质量稳定核相比,在低能区具有减弱动量耗散的特征.但随入射能量的升高,这种晕核结构对动量耗散的作用减弱.而且对所有质量靶核,所有碰撞参数和中子晕核结构都具有减弱动量耗散的作用.
The special role of neutron-halo nucleus ^19B on the momentum dissipation was investigated by using isospin dependent quantum molecular dynamics. In order to compare and protrude the special role of neutron-halo-nucleus ^19B, the momentum dissipation induced by a same mass stable nucleus ^19F was investigated under the same incident channel condition. It is found that the weak bound neutron-halo structure of ^19B weakens the momentum dissipation process compared to those induced by stable nucleus ^19F in the lower energy region. However the nuclear stopping of colliding system with the neutron-halo nucleus ^19B decreases gradually with the increasing beam energy. For all of mass targets and impact parameters the neutron-halo nucleus ^19B weakens the momentum dassipation process.
出处
《高能物理与核物理》
EI
CSCD
北大核心
2005年第10期978-982,共5页
High Energy Physics and Nuclear Physics
基金
国家重点基础研究发展计划项目(G2000077400)国家自然科学基金重点项目(10435080)国家自然科学基金(10447006)中国科学院知识创新工程重要方向项目(KJCX2-SW-N02)资助~~
