1. The problem statement, all variables and given/known data Let us approximate the Coulomb barrier of a heavy nucleus by a square potential with a height of V0 = 14.8 MeV and a width of L = 13.7 fm. What is the probability that an α particle with an energy of 5.70 MeV will tunnel through this barrier? 2. Relevant equations T=16(E/V_0)(1-(E/V_0))e^(-2kL) 3. The attempt at a solution essentially it should be a plug and chug however, I cannot get the correct answer. I know the equation above is an approximation given kL>>1 however, what defines that. That could be the only thing I would think that could throw it off.