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!

Barrier Tunneling

  1. Oct 23, 2005 #1
    I can't work out what I am doing wrong in this question. Anyways, here it is:
    A 3.0 MeV proton is incident on a potential energy barrier of thickness 10fm and height 10 MeV. What is the transmission coefficient T.
    And here is what I have tried:
    [tex]T=e^(-2bL)[/tex]
    [tex]b=\sqrt{\frac{8\pi^2m(U_b-E)}{h^2}}[/tex]
    [tex]b=\sqrt{\frac{8\pi^2(1.673*10^-27)\frac{10*10^6 - 3*10^6}{1.602*10^-19}}{(6.626*10^-34)^2}}[/tex]
    [tex]b=3.626*10^33[/tex]
    This gives me a transmission coeffecient of approximately 0, and the answer given in the book is 9.02*10^-6. Your help on this is much appreciated.
     
  2. jcsd
  3. Oct 23, 2005 #2
    Never mind, as soon as I posted it and saw my equation in front of me I worked it out. Silly mistake.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?