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Homework Help: Atomic Radiation

  1. Jul 29, 2008 #1
    1. The problem statement, all variables and given/known data
    Consider an X-ray tube that uses platinum (Z=78) as its target. Use the Bohr model to estimate the minimum kinetic energy electrons must have in order for Ka X-rays to just appear in the X-ray spectrum of the tube.


    2. Relevant equations
    Ek=-13.6ev * (Z-1)² / 1²
    EL=-13.6ev * (Z-1)² / 2²
    E=EK-EL

    3. The attempt at a solution
    Ek=-13.6ev * (Z-1)² / 1²
    Ek=-13.6ev * (78-1)² / 1²
    Ek=-80634.4ev

    EL=-13.6ev * (Z-1)² / 2²
    EL=-13.6ev * (Z-1)² / 2²
    EL=-20158.6ev

    E=EK-EL
    E=-80634.4ev - -20158.6ev
    E=100793 ev

    Did I do this correctly?
     
  2. jcsd
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