Protons Neutrons and Electrons in a neutron star


by vinceclortho
Tags: atomic physics, electrons, fermi energy, fermi level, neutron, neutron star, neutrons, protons
vinceclortho
vinceclortho is offline
#1
Feb1-14, 05:39 PM
P: 2
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!
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Astronuc
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#2
Feb1-14, 06:49 PM
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Quote Quote by vinceclortho View Post
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!
It would seem like a static problem. T = 0 means no kinetic energy, and ignoring gravity ostensibly means ignoring pressure.


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