knockout reaction as a new probe for formation in -decay nuclei

Yoshida, Kazuki   ; Tanaka, Junki*

Alternative to the decay lifetime measurement, we propose the proton-induced knockout reaction, (,), as a new probe for the surface formation probability of decay nuclei. Po(,)Pb reaction is described by the distorted-wave impulse approximation framework. It is shown that the Po/Po ratio of the knockout cross sections agree with that of the surface formation probabilities determined by the lifetime measurements. The result implies that the (,) cross section is a direct probe for the surface formation probability, which is an essential quantity to lead us to a complete understanding of the decay phenomena.