关键词: 
重离子反应 /
中心碰撞．结团发射 /
中等质量碎片发射 /
集体流 /
（定向）边流 /
径向流 /
熵

摘要: 本文概括和讨论在ＳＩＳ／ＥＳＲ．上用ＦＯＰＩ装置进行１００～８００ＭｅＶ／ｕＡｕ＋Ａｕ反应中心碰撞研究的首批实验结果：用高带电粒子多重性和低横动量方向性相结合的双重选择标准，以及横－纵动量比研究了最中心碰撞事件；基于这些选择方法，首次得到了结团（中等质量碎片）发射的多重性和快度分布，清楚地观测到中等快度源；详细地研究了集体流与碰撞参数、碎片原子序数和入射能量的关系；首次在实验上发现方位分布对称的径向流和观测到垂直于反应平面的中子“挤出”效应；引入新的方法研究了定向边流的性质；首次用所有碎片和轻带电粒子来提取和确定反应的熵值；对实验数据与各种理论模型计算作了比较． A survey of the first experimental results for the study of central An (100～800 MeV/u) on An collisions with FOPI at SIS/ESR was presented and discussed. Highlycentral collisions have been studied by using a double selection criterion which combines largecharged particle multiplicities with small transverse momentum directivities and using the ratio of the sum of transversal kinetic energies to the sum of the longitudinal kinetic energies;Based on these selections, were obtained, for...