  Purpose : The aim of this paper is to study the elastic Coulomb breakup of
$^{34}$Na on $^{208}$Pb to give us a core of $^{33}$Na with a neutron and in
the process we try and investigate the one neutron separation energy and the
ground state configuration of $^{34}$Na.
  Method : A fully quantum mechanical Coulomb breakup theory within the
architecture of post-form finite range distorted wave Born approximation
extended to include the effects of deformation is used to research the elastic
Coulomb breakup of $^{34}$Na on $^{208}$Pb at 100 MeV/u. The triple
differential cross-section calculated for the breakup is integrated over the
desired components to find the total cross-section, momentum and angular
distributions as well as the average momenta, along with the energy-angular
distributions.
  Results : The total one neutron removal cross-section is calculated to test
the possible ground state configurations of $^{34}$Na. The average momentum
results along with energy-angular calculations indicate $^{34}$Na to have a
halo structure. The parallel momentum distributions with narrow full widths at
half maxima signify the same.
  Conclusion : We have attempted to analyse the possible ground state
configurations of $^{34}$Na and in congruity with the patterns in the `island
of inversion' conclude that even without deformation, $^{34}$Na should be a
neutron halo with a predominant contribution to its ground state most probably
coming from $^{33}$Na($3/2^{+}$) $\otimes$ $2p_{3/2}\nu$ configuration. We also
surmise that it would certainly be useful and rewarding to test our predictions
with an experiment to put stricter limits on its ground state configuration and
binding energy.
