neutron swobodny

In fact, a free neutron decays this way with a mean lifetime of about 15 minutes.

In contrast, a free neutron (which also decays through the weak interaction) lives about 15 minutes.

In the core of an operating reactor there are billions of free neutrons.

Experimental nuclear fusion reactors produce free neutrons as a waste product.

Thus it is important that the frequency at which free neutrons occur is kept low, compared with the assembly time from this point.

When the pressure reaches about, the nucleons are mostly free neutrons.

At this point the matter is chiefly free neutrons, with a small amount of protons and electrons.

For instance, when two deuterium nuclei fuse, they often produce helium-3 and a free neutron.

Suppose we turn that shield off with a bomb and all those free neutrons are turned loose at once!

But it can drag in free neutrons, which have no charge.