SCALING PROPERTIES OF NUCLEAR MULTIFRAGMENTATION

Under given conditions, for instance, by heavy-ion collisions at intermediate and high energies, nuclei can break into several pieces. This new reaction mechanism is called nuclear multifragmentation. In analogy with a macroscopic system where a critical phenomenon takes place, nuclear multifragmentation also shows .the scaling properties. However, these properties can only be described partly by the restructured aggregation

核碎裂的标度特性

在一定的条件下,例如通过中高能重离子碰撞,原子核会碎裂成许多轻的核碎片。这种新的反应机制称为核碎裂。同发生临界现象时的宏观系统相类似,核碎裂也显示出标度特性。但这一特性只能部分地被重组聚集模型(RAM)所描述。本文给出了推广的重组聚集模型,并用它很好地复制了乳胶实验测得的核碎裂的标度特性。计算结果表明,当核内沉积的能量约为它束缚能的80—90％(≈6MeV)时,这一临界现象就出现了。