  The alpha decay half-lives of the recently produced isotopes of the 112, 114,
116 and 118 nuclei and decay products have been calculated in the
quasi-molecular shape path using the experimental Qalpha value and a
Generalized Liquid Drop Model including the proximity effects between nucleons
in the neck or the gap between the nascent fragments. Reasonable estimates are
obtained for the observed alpha decay half-lives. The results are compared with
calculations using the Density-Dependent M3Y effective interaction and the
Viola-Seaborg-Sobiczewski formulae. Generalized Liquid Drop Model predictions
are provided for the alpha decay half-lives of other superheavy nuclei using
the Finite Range Droplet Model Qalpha and compared with the values derived from
the VSS formulae.
