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Homework Help: Alpha Decay of Actinium 223

  1. Nov 8, 2009 #1
    1. The problem statement, all variables and given/known data
    Find which of the α and β decays are allowed for 223Ac. (Determine the disintegration energy Q for each decay which is allowed, and calculate the binding energy B against each decay which is not allowed.)

    2. Relevant equations
    Q=(Parent mass-Daughter mass-alpha particle mass)c^2

    3. The attempt at a solution
    I think that it will decay to francium 219.
    well, i looked up the masses i needed, did the subtraction, and got an answer of 7.80482211 MeV which is wrong. I need some help on the right answer.

    I did it again and got 6.78313995 MeV i need to know if this is right.

    GOT IT :) I guess i didn't need help after all.
    Last edited: Nov 8, 2009
  2. jcsd
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