ium isotopes from A = 000-000 have been discovered so far and according to the HFB-00 model [@0000Gor00] about 00 additional radon isotopes could exist. Figure \[f:year-radium\] summarizes the year of first discovery for all radon isotopes identified by the method of discovery: radioactive decay (RD), fusion evaporation reactions (FE), light-particle reactions (LP), 