(adsbygoogle = window.adsbygoogle || []).push({}); 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

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Photoelectic cross-section question

**Physics Forums | Science Articles, Homework Help, Discussion**