Question

during the calculation of energy from positron decay do you need to consider/add the mass of the extra electron on the daughter nucleus?

Answer 1

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Answer 2

There won't be any extra electron on the daughter nucleus. You can't just pop out an electron from no where.
What happens in positron decay( http://en.wikipedia.org/wiki/Positron_emission) is a proton decays into a neutron and a positron, there no new electron being formed.
So, No. you shouldn't add extra electron

Answer 3

I missed out on neutrino there (which is massless any way). proton decays into a neutron, a positron and a neutrino.

Answer 4

N-13 decays to C-13 by Beta positive decay. in the process, N-13 is neutral with 7 electrons but C-13 has a nuclear charge of +6e and still 7e- plus the emission of the e+. the masses of the parent and daughter typically include the Z e- as well. Do I need to include extra e- on the C-13 atom because it is charged?

Answer 5

My bad, sorry.
Yes you need to add the mass of the electron. Explanation being the same that the electron stays it can't disappear in the process of positron decay.