INSTANTON-LIKE TRANSITIONS AT HIGH-ENERGIES IN (1-DIMENSIONAL SCALAR MODELS .2. CLASSICALLY ALLOWED INDUCED VACUUM DECAY(1))

We consider classical Minkowskian solutions to the field equation in t he (1+1)-dimensional scalar model with exponential interaction that de scribe the unsuppressed false vacuum decay induced by n initial partic les. We find that there is a critical value of n below which there are no such solutions, i.e. the vacuum decay is always suppressed. For th e number of initial particles larger than this value the vacuum decay is unsuppressed at high enough energies.