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Energy needed to tunnel through a potential barrier

  1. Jan 31, 2009 #1
    1. The problem statement, all variables and given/known data

    An electron approaches a potential barrier 10 eV high and 0.5 nm wide. If the electron has a
    1% chance of tunnelling through, what must be its energy?

    2. Relevant equations

    don't know how to put equations in eg how do i get something like alpha and theta etc

    3. The attempt at a solution

    ended up with a massive equations with E's all over the place and imposible to solve :(
  2. jcsd
  3. Feb 1, 2009 #2
    Show how you tried to solve this problem. What is the transmission coefficient expression you are using?
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