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Half life time

  1. Apr 6, 2015 #1
    1. The problem statement, all variables and given/known data
    Nucleus ##^{252}_{98}Cf## alpha decays with half life time ##t_{1/2}=2.6## years.
    What is the velocity of the alpha particle after the decay?
    Estimate the half life time of the nucleus after the decay.

    2. Relevant equations


    3. The attempt at a solution
    Ok, no worries about the first part. I think i understand it and I think I got it right. My result is ##v_\alpha =0.058c##.

    However, I have got absolutely no idea what to do with the second part, where I am supposed to estimate the half life time of ##^{248}_{96}X##.

    I was thinking about Geiger-Nutall law, but I think this wouldn't be OK, even if I could somehow determine the constants in the equation. Any ideas on how to start here?
     
  2. jcsd
  3. Apr 6, 2015 #2

    SteamKing

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    I don't know why you are writing the daughter element as ##^{248}_{96}X ##. Can't you find a periodic table and look up element 96?
     
  4. Apr 6, 2015 #3
    Because:
    - I won't have a periodic table on the test either so I won't be able to look up for element ##96## (or any other that is not already stored in my head).
    - It doesn't change anything.
     
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