Lead-Bismuth alloy had been simulated by molecular dynamic method. Parameters Lennard-Jones potential aretaken from data available in the literature which the interatomic potential calculated by ab-initio method.The result of molecular dynamic proceses showed good conservation of total energy accuracy withrespect to the time step in the order 10-10. The radial distribution function with variation of temperaturehad shown the liquid state of alloy at 396.5 K, 579,71 K. But at 275,36 K the simulation showed theliquid state also. In fact at this temperature, It should be in the solid state.Keywords: Lead-Bismuth, Molecular dynamic, Radial Distribution Function.Alan Maulana*, Zaki Su’ud*,Hermawan K.D**, Khairurijal*; * Departemen Fisika MIPA ITB ** Departemen Fisika Teknik ITB
