 The now @-@ confirmed discovery of flerovium was made in June 1999 when the Dubna team repeated the first reaction from 1998 . This time , two atoms of element 114 were produced ; they alpha decayed with a half @-@ life of 2 @.@ 6 s , different from the 1998 result . This activity was initially assigned to 288Fl in error , due to the confusion regarding the previous observations that were assumed to come from 289Fl . Further work in December 2002 finally allowed a positive reassignment of the June 1999 atoms to 289Fl . 
