Heavy duty A high-energy photonic jet (white and blue) blasts through a collapsing star with a black hole at its centre. The cocoon where free neutrons may be available for the r-process is shown in ...

In small reactors, however, the spontaneous (that is, not induced by neutrons) fission of radioactive nuclei such as uranium-238 prevents a complete die-off, since spontaneous fission also creates ...

Neutrons, the mundane-seeming inhabitants of atoms, could be hiding a secret connection to dark matter, according to a new proposal.