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Protons Neutrons and Electrons in a neutron star

  1. Feb 1, 2014 #1
    Hi All,

    I am preparing for PhD quals and have been looking at problems from other universities. I came across this one and am stumped on how to tackle it.

    " Assume that the neutron density in a neutron star is 30.1/fm (that is 0.1 neutron per
    cubic Fermi). Assuming T=0 and ignoring any gravitational forces calculate the ratio of
    neutrons to protons to electrons.Hint: determine their Fermi energy."

    Even with the hint not sure.

    I would appreciate any thoughts!
  2. jcsd
  3. Feb 1, 2014 #2


    User Avatar

    Staff: Mentor

    It would seem like a static problem. T = 0 means no kinetic energy, and ignoring gravity ostensibly means ignoring pressure.
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