Descrição: The partial half-life of radioactive decay of nuclei by the emission of fragments
heavier than the alpha particle, such as the emission of carbon, oxygen, neon, magnesium,
and silicon isotopes from translead nuclei (known as cluster radioactivity), is re-evaluated
in the framework of a semiempirical, one-parameter model based on the quantum mechanical
tunneling mechanism through a potential barrier where the Coulomb, centrifugal, and
overlapping contributions to the barrier are considered within the spherical nucleus approximation.
This treatment has shown not only very adequate to t all the existing half-life
data, but also to give more reliable half-life predictions for new, yet unmeasured cases of
spontaneous emission of massive nuclear fragments both from heavy and intermediate-mass
parent nuclei as well.