Application of dinuclear system model to description of half-lives of heavy and superheavy nuclei

The dinuclear system model provides a good description of the absolute half-lives for the alpha-decay and spontaneous- ssion channels from the ground and isomeric states of various nuclei. Based on this, an approach is proposed to determine the spins of the ground and isomeric states from experimental half-life data. Using this approach alpha-decay chain schemes starting from ^273,275Ds and ²⁸⁶Mc are proposed. For the alpha-decay ²⁵⁷Sg → ²⁵³Rf a theoretical decay scheme is constructed in which the possible spins of the ground and isomeric levels of the nuclei are estimated. In addition, the half-lives of Rf and No isotopes located near the neutron drip-line are estimated.