摘要
用４６．７ＭｅＶ／Ａ１２Ｃ轰击１５９Ｔｂ、１９７Ａｕ和２０９Ｂｉ，测量关联裂片的速度和角度．研究了线动量转移、质量和出平面角分布，提取了核温度．应用级联两体统计衰变理论进行了拟合与解释，结果表明：在入射能约为５０ＭｅＶ／Ａ的中能重离子碰撞中，以非完全熔合方式形成了核温度高达４－５ＭｅＶ的类复合核，其后通过裂变、蒸发级联统计两体衰变而退激．
The velocities and allgles of fission partners emitted from reactions in 12C +159Tb/197Au/209Bi systems with bombarding energy of E/A = 46.7MeV are measured. The linear momentum transfer from projectile to target. mass and out-of-reaction plane angle distributions of fission fragments are studied, and the temperatures of the target residues are extracted. These results have been explained by statistical binary decay model. It seems that the compound-like system with high temperature about 4-5MeV has been formed through incomplete fusion with incident energy up to 50MeV/A and it decays by fission and light particle emission.
出处
《高能物理与核物理》
CSCD
北大核心
1994年第3期202-207,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
关键词
线动量转移
核温度
重离子反应
Linear momentum transfer, Statistical binary decay, Incomplete fusion, Nuclear temperature.
