Neutron stars are created by supernovas where nuclear fusion past iron-56 requires energy to complete instead of releases energy. Very heavy isotopes show evidence for valence Helium-6-2 around a tighter inner nucleus as nuclear molecules. This would stabilize U-238-92 as Th-232-90 with Helium-6-2 in nuclear molecule valence. See the Table of the Isotopes in the CRC Handbook of Chemistry and Physics, and notice the stability of Bi-209, Tl-203, Au-197, and Ir-191. In a neutron star, valence Helium-6-2 would take the place of white dwarf star electrons to prevent further collapse of the star. Dark matter muons in valence with dark matter protons (observed as neutrons), would be a theoretical explaination for Helium-6-2 stabilized nuclear molecules.
A recent neutron star finding is a neutron star that is both a radio pulsar and an x-ray pulsar, which to Earth alternates between being a radio pulsar and an x-ray pulsar. The 11-year solar cycle of magnetic field reversal would also be observed as cycles in magnetic neutron stars (pulsars). Synchroton emission by electrons at CERN is why they rebuilt the 200 billion electron volt electron accelerator as a 7 trillion electron volt proton accelerator. Electron x-ray emission would alternate with proton radio wave emission as Earth observes the regular magnetic field reversal of a pulsar, is my explaination for this observation.