PPT Slide
1. Between densities of 4.3 x 10 kg m and 2 x10 kg m , the lowest energy state is reached when nuclei are embedded in an electron and neutron fluid.
2. Above 2x10 kg m , there is a continuous neutron fluid with electrons and protons as minor constituents.
Notes:
The degenerate neutron fluid is a superfluid, ie its viscosity is zero. The degenerate electron gas has a high conductivity and the proton fluid may be superconducting. This is sufficient to maintain the magnetic field for most of the life of the pulsar.
See Smith p39-40, Longair p 94-95