Description: The region of validity of the TDHF approximation is extended by including the collisions between particles. The resultant equations of motion consist of a modified TDHF equation and a master equation for the occupation numbers. Concepts such as entropy, temperature, and thermal equilibrium can be quantitatively introduced. The well-known H-theorem that entropy never decreases is proved for nuclear systems. New types of level crossing formulas are obtained to shed light on how a nonequilibrium finite nuclear system approaches thermal equilibrium. 2 figures.
Date: January 1, 1979
Creator: Wong, C.Y. & Tang, H.H.K.
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