Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Estimating Ion Pairs Produced by 5MeV alpha in UF6

  1. Feb 28, 2012 #1

    I'm attempting to work out the number of ion pairs produced by a 5MeV alpha particle in UF6 (in each of the solid, liquid, and gas states). Using the technique from my old radiation physics book (Turner 3rd ed) I should simply apply the Bethe formula

    [tex]-\frac{dE}{dx}=\frac{4\pi k^{2}z^{2}e^{4}n}{mc^{2}\beta^{2}}[ln\frac{2mc^{2}\beta^{2}}{I(1-\beta^{2}}-\beta^{2}][/tex]

    Then divide by the ion production energy to arrive at ion-pairs per unit distance. However, don't I need to account for the density of the target material somewhere in the Bethe formula (and thus the differences between -dE/dx in solid, liquid, or gaseous UF6)?

    Thanks for any pointers on where I'm going astray!
  2. jcsd
  3. Feb 28, 2012 #2
    I think I found what I was looking for in a paper by J. F. Ziegler.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook