MULTIFRAGMENTATION AND FLUCTUATION OF INTERACTION POTENTIAL

The variation of equipotential lines of interaction potential with tim e intuitively gives the information about the fluctuation of the poten tial in intermediate energy heavy ion collisions. At the early stage o f collisions, the potential value in the central region of the system could be positive. The pursued irregular deformation of equipotential lines in the region, especially the appearance of the negative curvatu re of the equipotential lines, causes the chaotic nucleonic motion. Th e phase difference of the neighboring nucleons increases with time exp onentially, and the phase space of nucleons therefore separates and ca uses the multifragmentation.