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Homework Help: Q-value and kinetic energy of alpha particle in alpha decay.

  1. Oct 13, 2014 #1
    1. The problem statement, all variables and given/known data
    The nuclear masses of parent and daughter nuclei are Mp= 226.025 amu and Md=222.017 amu.Mass of alpha particle is Mα=4.002amu.Find qvalue and kinetic energy of alpha particle emitted for the alpha decay.
    2. Relevant equations
    Q=(Mp -Md-Mα)amu...1
    Assuming nucleus to be at rest as it is very heavy
    Q=Eα(1+ Mα/Md)...2

    3. The attempt at a solution
    Putting given values in 1 i get Q=5.589MeV (1amu= 931.5MeV)
    Substituting this in 2 i get Eα=5.490 MeV.
    Have i done this correctly??
  2. jcsd
  3. Oct 18, 2014 #2
    Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Jun 22, 2016 #3
    I think you should take into account the mass of the electrons as well. They are small but they will contribute as well
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