  We present a new method to expose the dead cone effect at colliders using
iterative declustering techniques. Iterative declustering allows to unwind the
jet clustering and to access the subjets or branches at different depths of the
jet tree.
  Our method consists on declustering the heavy flavour-tagged jet using
Cambridge-Achen algorithm following the branch containing the heavy flavour at
each step and registering the kinematics of the complementary untagged prong.
The kinematics of the complementary untagged prong fill a Lund map representing
the gluon radiation off the heavy flavour quark at each step of the vacuum
shower.
  Using Pythia8 MC, we show that a simple cut on the Lund plane introduced by
log($k_{T}$) $> 0$, suppresses hadronisation effects and the angular separation
between the jet prongs becomes very sensitive to flavour effects. A clear
suppression for heavy flavour jets relative to inclusive jets in the region of
splitting angles delimited by the relation $\theta < m_{Q}/E$ is observed,
where $m_{Q}$ is the mass of the heavy quark and $E$ is the energy of the
radiator or splitting prong.
