TRANSITION RATES OF REACTIONS IN THE MICROCANONICAL ENSEMBLE AND THE FINITE-SIZE EFFECT

The calculational rules of a transition rate of a generic reaction tak ing place in a closed system are found. The rules are formulated in te rms of the free energy of the system and the transition rate of the re action in a finite temperature system. It is found that, in some kinem atical regions, the finite-size effect is much larger than naively exp ected.