Effects of different effective nucleon-nucleon interactions on α-decay half-life and extracted α-cluster preformation probability

Systematical calculations are performed to study the effects of different effective nucleon-nucleon (NN) interactions on alpha-decay half-life and extracted alpha-cluster preformation probability. Within the double-folding model, both the nonrelativistic M3Y-type and the relativistic R3Y-type NN interactions are involved and different methods to include the medium effect into the interactions are also introduced. The differences of the effective NN interactions as well as their corresponding nuclear potentials and total alpha-core potentials are analyzed in detail, and then their impacts on the alpha-decay half-lives are discussed. By fitting the experimental decay half-lives of alpha emitters throughout the nuclide chart, three kinds of common alpha-cluster preformation probability for even-even, odd-A, and odd-odd parent nuclei are extracted within two usual strategies. The obtained values are consistent with previous results and the medium effect on the alpha-cluster preformation probability is further discussed. Under the extracted preformation probability, the theoretical alpha-decay half-lives are in good agreement with the experimental data.