Quantum molecular dynamics simulation formultifragmentation resulting from an expandingnuclear matter

• 作者: A. Abd El-Daiem Atef Abdel-hafiez M. A. Khalifa
• 来源期刊: 自然科学期刊(英文)
• 学科: 物理学
• 关键词: QUANTUM MOLECULAR DYNAMICS MULTIFRAGMENTATION
• 年，卷（期）: 2011,（7）
• 页码范围: 594-599
• 页数: 6页
• 分类号: O57

摘要

Quantum molecular dynamics (QMD) is used to investigate multifragmentation resulting from an expanding nuclear matter. Equation of state, the structure of nuclear matter and symmetric nu-clear matter is discussed. Also, the dependence of the fragment mass distribution on the initial temperature (Tinit) and the radial flow velocity (h) is studied. When h is large, the distribution shows exponential shape, whereas for small h, it obeys the exponentially falling distribution with mass number. The cluster formation in an expanding system is found to be different from the one in a thermally equilibrated system. The used Hamiltonian has a classical kinetic energy term and an effective potential term composed of four parts.