Effect of nuclear deformation on the alpha-decay half-life of even-even alpha emitters

Alpha-decay half-life of even-even emitters has been calculated in terms of tunnelling through a quantum mechanical potential barrier. A multipolar ex pansion of Coulomb potential has been developed taking into account the nuc lear quadrupole, hexadecapole, and hexacontatetrapole deformations. We show that using a free-parameter model the calculated half-lives do not vary si gnificantly with higher order multipolarities of the daughter nucleus defor mation.