Question: Beta-plus decay is A X Z A Y Z-1 + e + + . a. Determine the mass threshold for beta-plus decay. That is,

Beta-plus decay is ^AX_Z → ^AY_Z-1 + e⁺ + ν.
a. Determine the mass threshold for beta-plus decay. That is, what is the minimum atomic mass m_X for which this decay is energetically possible? Your answer will be in terms of the atomic mass mY and the electron mass m_e.
b. Can ¹³N undergo beta-plus decay into ¹³C? If so, how much energy is released in the decay?

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