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Homework Help: Calculating Energies of Pion - Seeming trouble with constants?

  1. May 11, 2013 #1
    1. The problem statement, all variables and given/known data

    Calculate the energy for 1S->2P transition in lithium and carbon. We had to calculate the energy and eigenvalue equations (though I verified these are correct)

    2. Relevant equations
    E = mc^2/sqrt(1+(Za/lambda)^2)
    lambda = n + 1/2 + sqrt((l+1/2)^2- (Za)^2)

    3. The attempt at a solution

    The constants I tried were the mass of the pion =139.6 MeV
    c = 3E8
    Z =3
    a = 7.29E-3 (Via CODATA)
    and I'm assuming that n = 1, l =0.

    When I plug these in, I get something WAY off. Like not even order of magnitude correct, off. So am I using the right constants? If not, which ones should I be using for these?
  2. jcsd
  3. May 12, 2013 #2
    Trying n=2; l=1 also fails. Any ideas?
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