during the calculation of energy from positron decay do you need to consider/add the mass of the extra electron on the daughter nucleus?
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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
I missed out on neutrino there (which is massless any way). proton decays into a neutron, a positron and a neutrino.
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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?
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.