Neutron Matter

[GTrax]

I seek some links for pointers to be able to answer the question ..

"Given that neutrons can approach each other easier than protons, and that the Strong Force will hold neutrons to neutrons when they get within the (short!) range where the Strong Force can be effective, why do we not have pure neutron matter in abundance - without the need for it to be part of a collapsing star, or other extreme physical conditions" ?

[mathman]

Free neutrons have a half life of about 15 (?) minutes. There is no way to build neutron matter up except by intensive gravitational force. Also neutron-neutron collisions tend to be elastic. It is very had to get them to stick together.