Abstract
A semiempirical model based on the quantum-mechanical tunnelling mechanism of alpha emission from nuclei has been used to systematize the alpha-decay half-lives of a set of 336 nuclides, comprising all the alpha-emitter nuclides whose T1/2α-data for ground-state to ground-state transitions of mutual angular momentum ℓ = 0 are known. With a minimum of data rejection (only ∼5% of cases), the procedure has been successful in reproducing quite satisfactorily (within a factor of ∼2) most of the cases (∼80%) investigated. A few significant discrepancies found between measured and calculated results are analysed and discussed. Also reported is the prediction from the model for possible new alpha-emitter nuclides, namely 180W, 184Os and 228Ra, for which cases the calculated partial alpha-decay half-lives fall within the range of half-lives measurable by the current techniques.
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