2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90041A study is made of the behavior of unstable states in simple models which nevertheless are realistic representations of situations occurring in nature. It is demonstrated that a non-exponential decay pattern will ultimately dominate decay due to a lower limit to the energy. The survival rate approaches zero faster than the inverse square of the time when the time goes to infinity.23 pages, 5 figuresQuantum Physicstext