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Homework Help: Q-value of the β- decay

  1. Nov 3, 2017 #1
    1. The problem statement, all variables and given/known data

    Using the atomic masses of 65Ni and 65Cu, calculate the Q-value of the β- decay of 65Ni (in MeV).
    Answer = c) 2.14 MeV

    2. Relevant equations

    65Ni -> 65Cu + e-

    3. The attempt at a solution

    64.9308 -> 64.9277 + 0.0005485
    Products - Reactants
    -0.0025515 * 931.5 = 2.3767

    My answer is in the same ball park but not correct. Are my equations correct?
     
  2. jcsd
  3. Nov 3, 2017 #2
    edited
     
    Last edited: Nov 3, 2017
  4. Nov 3, 2017 #3

    Orodruin

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    Please put units into your attempt.
     
  5. Nov 3, 2017 #4

    Orodruin

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    Also, assuming your masses are in atomic mass units, you have used the wrong mass for Ni-65.
     
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