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Homework Help: Neutron Decay

  1. Dec 13, 2007 #1
    Suppose the neutron decay time n was 89 sec. AND the difference in
    rest mass between neutron to proton, Qn, was 0.129 MeV. What would
    the maximum Helium fraction, Yp, be?
  2. jcsd
  3. Dec 13, 2007 #2


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    One needs to provide more information in order to solve this problem. A free neutron decays into a proton, electron and antineutrino, so the product of free neutron decay would be hydrogen. Or is the neutron decaying in a tritium atom, which then is transformed to He-3?

    Or does one mean hydrogen rather than He?
  4. Dec 13, 2007 #3
    yes it is transformed into He-3, that was all the info from the question, but the rest info as it says in the book when it is transformed into He-3
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