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An excited .^(69)Zoverset(*)n Nucleus at...

An excited `.^(69)Zoverset(*)n` Nucleus at rest decays to ground state `.^(69)Zn` by way of emitting a gamma photon. The energy equivalent of difference in mass of `Zoverset(*)n` and Zn is 0.44 MeV. Calculate the kinetic energy of recol of Zn nucleus. Rest mass of `.^(69)Zn` is `M_(0)=68.927u`.

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The correct Answer is:
1.5eV
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