Favored alpha-decays of medium mass nuclei in density-dependent cluster model

摘要

We present a systematic calculation on a-decay half-lives of medium mass nuclei by the improved version of density-dependent cluster model, in which the nuclear potential between alpha-particle and daughter nucleus is obtained from the double-folding integral of the renormalized M3Y nucleonnucleon interaction with the matter density distributions of alpha-particle and daughter nucleus, and the Coulomb potential is obtained from the double-folding integral of the proton-proton Coulomb interaction with the charge density distributions of alpha-particle and daughter nucleus. For the favored transitions from nuclear ground states, the theoretical partial half-lives of alpha-decay are in good agreement with experimental ones. On average, the density-dependent cluster model (DDCM) can reproduce the experimental alpha-decay half-lives of nuclei with Z = 52-80 to within a factor of 3 or better. Therefore DDCM gives reliable and accurate results for favored alpha-decays in the medium mass region. (c) 2005 Elsevier B.V. All rights reserved.