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I What does ALPHA_EM stand for?

  1. Apr 14, 2016 #1
    What does the term αEM mean?

    I'm looking at the Coulombic Potential of an alpha particle separating from a daughter nucleus and it is stated that: VC(r)=2ZαEMħc/r

    Im not really sure where this term derives from? Does anyone know?
  2. jcsd
  3. Apr 14, 2016 #2


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    Gold Member

    Its called the fine structure constant.
    And that's the potential energy of two particles with charges e and Ze.
  4. Apr 14, 2016 #3
    Omg ofc it is! I was confused because it was about alpha particles. Thank you!
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