A neutron floating about in space will remain a neutron. You won't get two neutrons suddenly turning up where you had one before. But you'll get a proton, an e

A neutron floating about in space will remain a neutron. You won't get two neutrons suddenly turning up where you had one before. But you'll get a proton, an electron and an anti-electron-neutrino. Possibly a photon as well. Remember, free neutrons only have a mean lifetime of less than 15min.