摘要
报道了２５ＭｅＶ／ｕ４０Ａｒ＋１９７Ａｕ反应中裂片符合下的粒子—粒子关联函数及其发射时间．实验测得粒子的平均发射时间为２００—３００ｆｍ／ｃ，表明轻粒子的裂前发射占主导．在平面发射和出平面发射的粒子发射时间相差很少，发射时间是随着粒子能量的改变而发生显著变化，从中速粒子的约３００ｆｍ／ｃ下降至类弹粒子的约３０—１００ｆｍ／ｃ．
Particle-particle correlation function and emission time of light particles detected in coincidence with fission fragments have been measured for the 40Ar+197Au collisions at E/A=25MeV. A mean emission time of 200-300fm/c suggests that the prescission emission of light particles dominates. The emission time changes slightly for particles of in-plane emission and out-of-plane emission, but varies dramatically with the energy of particles. It decreases from about 300fm/c for mid-rapidity particles to about 30-100fm/c for projectile-like particles.
出处
《高能物理与核物理》
CSCD
北大核心
1996年第7期596-600,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
中国科学院基金
关键词
关联函数
发射时间
热核
衰变
correlation function, emission time, in-plane emission, out-of-plane emission
