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Homework Help: Quantum tunnelling for a finite-square potential parrier

  1. Nov 23, 2009 #1
    1. The problem statement, all variables and given/known data
    At x=0, a proton with a kinetic energy of 10 eV is travelling in the x direction (potential energy = 0). At x = 1nm, it encounters a potential barrier of height 12 eV and width .2nm. The potential returns to 0 at x = 1.2nm.

    Give the amount of the particle on both sides of the barrier after the collision.

    2. Relevant equations
    T - Probability of Transmission
    R - Probability of Reflection

    3. The attempt at a solution

    Actually my question here isnt about the exact solution. Does anyone know what is meant by "the amount of the particle on both sides"? is this just another way of asking for T and R?
  2. jcsd
  3. Nov 24, 2009 #2


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    Homework Helper

    "amount of the particle on both sides" doesn't really make sense, but I guess it's supposed to mean T and R - the late-time probabilities of the particle being found on either side of the barrier. I can't think of anything else interesting that you could be expected to find.
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