  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 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 Q values calculated in the RMF framework , though reasonably
agree with the experiment, are not accurate enough for the reliable WKB
calculation of decay half- lives. We therefore, advocate that the use of
accurate (e.g. experimental) Q values is crucial for the reliable description
of the experimental {\alpha} - decay half-lives.
