Open AccessQuantum molecular dynamics simulation formultifragmentation resulting from an expandingnuclear matter
Author(s) -
A. Abdel-hafiez,
Mohamed A. Khalifa,
A. Abd El-Daiem
Publication year - 2011
Publication title -
natural science
Language(s) - English
Resource type - Journals
eISSN - 2150-4105
pISSN - 2150-4091
DOI - 10.4236/ns.2011.37082
Subject(s) - physics , nuclear matter , kinetic energy , molecular dynamics , hamiltonian (control theory) , quantum , exponential function , classical mechanics , atomic physics , quantum mechanics , nucleon , mathematical optimization , mathematical analysis , mathematics
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