Abstract
The partial half-life of radioactive decay of nuclei by the emission of fragments heavier than the α-particle, such as the emission of carbon, oxygen, neon, magnesium and silicon isotopes from trans-lead nuclei (known as cluster radioactivity), is re-evaluated in the framework of a semi-empirical, 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 proven adequate not only to fit 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 from both heavy and intermediate-mass parent nuclei.
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