Most fissions are binary fissions (producing two charged fragments), but occasionally (2 to 4 times per 1000 events), three positively charged fragments are produced, in a ternary fission.
De fleste fissioner er binære fissioner (der frembringes 2 ladede brudstykker), men lejlighedsvis (2 til 4 gange per 1000 begivenheder), frembringes 3 positivt ladede brudstykker i en terniær fission.