Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-06-11
Europhys.Lett.85:20006,2009
Physics
Nuclear Physics
Nuclear Theory
LaTex, 1 figure, new comments and references added
Scientific paper
10.1209/0295-5075/85/20006
The theoretical treatment of alpha decay by Gamow is revisited by investigating the quantum time scales in tunneling. The time spent by an alpha particle in front of the barrier and traversing it before escape is evaluated using microscopic alpha nucleus potentials. The half-life of a nucleus is shown to correspond to the time spent by the alpha knocking in front of the barrier. Calculations for medium and super heavy nuclei show that from a multitude of available tunneling time definitions, the transmission dwell time gives the bulk of the lifetime of the decaying state, in most cases.
Castaneda H. M.
Kelkar Neelima G.
Nowakowski Marek
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