Lifetimes of the α decay chains of superheavy element Z=115

The lifetimes of the consecutive alpha decay chains of recently synthesized new element 115, (287)115 and (288)115, have been calculated theoretically within the WKB approximation using microscopic alpha-nucleus interaction potentials obtained by folding in the densities of the alpha and the daughter nuclei with a realistic effective interaction. M3Y effective interaction, supplemented by a zero-range pseudo-potential for exchange along with the density dependence, has been used for calculating the nuclear interaction potentials. Spherical charge distributions have been used for calculating the Coulomb interaction potentials. These calculations provide consistent estimates for the lifetimes of the consecutive alpha decay chains of the superheavy element 115.