Exact dynamical approach to spherical ground-state proton emitters - art. no. 014609

The proton emission from ground-state spherical nuclei is investigated exac tly through the numerical solution of the time-dependent Schrodinger equati on for initial single-proton quasistationary states. Contrary to common bel ief, it is shown that such calculations can be performed for any proton hal f-life ranging from 10(-22)-20 s, the longest proton lifetime observed at p resent. The important and careful choice of the initial metastable state is clarified. Applied to the calculation of the decay width of several ground -state spherical emitters, this method gives comparable results with the di storted wave-Born approximation and therefore justifies its use.