1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Photoelectic cross-section question

  1. May 19, 2008 #1
    1. The problem statement, all variables and given/known data
    Show that if we consider photoemission from the 1s state of a charge Z atom,
    [tex]
    \sigma \propto Z^5}}
    [/tex], in the limit [tex] p_fa_0/Z\hbar >> 1.
    [/tex]


    2. Relevant equations

    [tex]
    \sigma = \frac{128a_0^3\pi e^2p_f^3}{3m\hbar^3\omegac[1+p_f^2a_0^2/\hbar^2]^4}}
    [/tex]



    3. The attempt at a solution
    Actually I know how to do this. [tex] a_0 -> a_0/Z [/tex]. My question is why is this so? What is the physical interpretation/what does it mean?

    jsc
     
  2. jcsd
  3. May 19, 2008 #2
    I think the reason [tex] a_0 -> a_0/Z [/tex] is because the Coulomb potential in the Hamiltonian changes from [tex] q^2/r [/tex] to [tex] Zq^2/r [/tex]. Is that right?

    jsc
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Photoelectic cross-section question
Loading...