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Homework Help: Problem for Quantum physics

  1. Feb 1, 2007 #1
    here is the question.
    Researchers want to construct a scattering experiment using a powerful source of 5.5 MeV alpha-particles to scatter from a gold foil. They want to be able to count 1 particle/s at 50 degree. Their detector subtends a small angle and is limited to a maximum count rate of 2,000 particles/s.
    Will their experiment work without modifying the detector if the other angle they want to measure is 6 degree.

    Can anyone help me out on this question? I do not know which eqution I have to apply. (Rutherford eq probably??)
  2. jcsd
  3. Feb 1, 2007 #2

    Meir Achuz

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    You need the formula for the Rutherford differential cross section.
    Then check if sigma(6)/sigma(50) is less than 2000.
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