The most common small fragments, however, are composed of 90% helium-4 nuclei with more energy than alpha particles from alpha decay (so-called "long range alphas" at ~ 16 MeV), plus helium-6 nuclei, and tritons (the nuclei of tritium).
De mest almindelige brudstykker er imidlertid sammensat af 90% helium-4 kerner med mere energi end alfa partikler fra alfa henfald (såkaldt "langtrækkende alfa" med energi ~ 16 MeV), plus helium-6 kerner, og tritium-kerner.