The gas-filled recoil separator RITU, combined with Ge detector
arrays at
the Department of Physics, University of Jyväskylä (JYFL),
Finland, has
successfully been employed in recoil-decay-tagging (RDT) experiments
for
probing structures of several very neutron-deficient heavy nuclei for
the
first time. In this paper new data for Hg, Pb and Po nuclei are
summarized
and discussed. These data shed new light on the behaviour and role of
the
proton multiparticle-multihole intruder states in nuclei at the 82