It was predicted already more than 20 years ago that coexisting oblate- and prolate-shaped minima should come down in energy in neutron-deficient polonium isotopes around ¹⁹²Po. Progress in experimental techniques, and in particular in the use of the Recoil-Decay-Tagging method, has made it possible to verify these predictions. Recent RDT results obtained at the University of Jyvaeskylae  on shape coexistence in very neutron-deficient Po isotopes will be discussed.

PACS numbers: 21.60.Ev, 23.20.Lv, 27.80.+w