neutron matter

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neutron matter

[′nü‚trän ‚mad·ər]
(astrophysics)
Degenerate matter such as occurs in neutron stars in which there are 8 to 12 times as many neutrons as protons.
References in periodicals archive ?
Neutron stars are composed of neutronium, a compact pack of neutrons, and have densities around 4 x [10.
Neutronium, the "element of zero atomic number," absent from standard periodic tables, is at the center of this work.
From the density of neutronium, we can infer that the radius of such a neutron star would be about 15 km.