Download PHGN341: Thermal Physics Quiz 6 March 29, 2013 NAME:

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript 
NAME:
PHGN341: Thermal Physics
Quiz 6
March 29, 2013
1. Consider a spin-1 paramagnetic atom in thermal equilibrium with a reservoir at temperature, T, in an external magnetic
field, B0 . The energy of such an atom in an external magnetic field is U = −µ0 B0 mj , where mj is the quantum number
for the z-component of the angular momentum and µ0 is the Bohr magneton. (Recall that a spin-1 atom can have three
possible m-substates: mj = {+1, 0, −1}.)
a. Find the partition function for the atom.
b. Find the average energy of the atom.
c. What is the atom’s average magnetic moment, µ = µ0 mj ?
1
Related documents