HALF LIVES AND Q VALUES OF NUCLEI APPEARING IN THE alpha - DECAY CHAINS OF RECENTLY REPORTED NEW ISOTOPES

Microscopic investigations for the observed properties of the recently reported five unstable new isotopes are carried out. The ground state properties are calculated in the relativistic mean field (RMF) framework and the results reproduce the experiment well as expected. The alpha - decay lifetimes are calculated in the double folding model using WKB approximation which requires the relevant Q values of alpha - decay and the alpha - daughter (V-alpha D) potential. The latter is obtained by folding the effective M3Y nucleon nucleon potential with the RMF nucleon density distributions for the daughter nucleus and that of the alpha particle which is assumed to be of Gaussian shape. The corresponding decay half - lives obtained by using available phenomenological expression are also presented, discussed and compared. It is observed that the use of accurate Q values (very close to the experimental values) is crucial for the reliable description of the experimental alpha - decay half-lives in the WKB framework.