Calculate Fermi Temperature for 3He & Neutron Stars

  • Thread starter Thread starter raintrek
  • Start date Start date
  • Tags Tags
    Fermi Temperature
Click For Summary
The discussion focuses on calculating the Fermi temperature for liquid 3He and neutrons in a neutron star, emphasizing the need for understanding the relevant equations and concepts. Key equations include those for number density, Fermi radius, Fermi energy, and the relationship between Fermi energy and temperature. The original poster expresses uncertainty due to previous experience only with electrons, prompting responses that stress the importance of demonstrating prior knowledge and attempts at problem-solving. Participants encourage the poster to reflect on their studies to find applicable methods for these calculations. Overall, the thread highlights the necessity of applying theoretical knowledge to solve complex physics problems.
raintrek
Messages
68
Reaction score
0

Homework Statement



Calculate T(fermi), the fermi temperature for

a) Liquid 3He (density 81kg/m^3) [these are not electrons]
b) neutrons in a neutron star (density 10^17 kg/m^3)

Homework Equations



n, number density = z*Na*p / M (Na=avogadro, z=valence,p=density,M=molecular mass)

Kf^3 = 3pi^2 * n (Kf = fermi radius)

Ef = hbar^2 * Kf^2 / 2*m (fermi energy)

Tf = Ef/Kb (Kb - boltzmann)

The Attempt at a Solution



Only ever done these where we're dealing with electrons (for ex, potassium etc). Not sure where to go with it...
 
Physics news on Phys.org
raintrek said:
Only ever done these where we're dealing with electrons (for ex, potassium etc). Not sure where to go with it...
That's not good enough. PF rules require that you show your attempt. What have you studied?
There must be something in your studies that hints at how to solve this problem.
 

Similar threads

Electrons escaping a metal surface
  • · Replies 3 ·
Replies
3
Views
2K
Statistical physics, using the ideas of Fermi Energies, etc. for a star
  • · Replies 1 ·
Replies
1
Views
2K
Fraction of occupied states (Fermi-Dirac distribution + DOS)
  • · Replies 1 ·
Replies
1
Views
3K
Fermi temperature of a 1D electron gas
  • · Replies 5 ·
Replies
5
Views
3K
Quantum Gases - Mixing of 3He and 4He
  • · Replies 1 ·
Replies
1
Views
2K
Deriving the kinetic energy flux in an effusion process
  • · Replies 4 ·
Replies
4
Views
3K
Fermi Energy: Calculating Probabilities for Different Temperatures
  • · Replies 3 ·
Replies
3
Views
2K
Fermi Energy in Intrinsic Si, Ge, and GaAs
  • · Replies 1 ·
Replies
1
Views
6K
Fermi energy condensed matter exam problem
  • · Replies 3 ·
Replies
3
Views
2K
Stability of a White Dwarf Against Gravitational Collapse
  • · Replies 3 ·
Replies
3
Views
2K