Calculating Quantum Tunneling Probability - 1.524 eV, 343 pm, 2.654 eV

[alexis12]

Homework Statement

What is the approximate transmission probability (in %) of an electron with total energy 1.524 eV through a barrier of thickness 343 pm, and a potential height of 2.654 eV? (Does it matter what the potential energy is before and after the barrier? Not really, as long as it is <1.524 eV, so in both cases there is a traveling wave.)

Homework Equations

None given however I believe it has something to do with: http://en.wikipedia.org/wiki/Transmission_coefficient

I've managed the previous question which was about probability of transmission however it didn't deal with barrier thickness which I am not accustomed to. I can't find any literature on the subject other than the Wikipedia article I linked.

The Attempt at a Solution

No real attempt, I managed to calculate Kappa which is
K = Square root of {[2m(E-V0)] / (h-bar^2)}

 

[alexis12]

Figured it out! It's exp(-2 *kappa *barrier thickness)