Dear experts in this question why cant we ignore m(e) as we have to calculatd the max kinetic energy - Physics - Nuclei

Question

Dear experts in this question why cant we ignore m(e) as we have to
calculatd the max kinetic energy I viewedthe solution to this
question but there they talk something about nuclear mass and all
What is that and why do we adopt that concept only to this question
this is an ncert text question q13 13 from nuclei No links pls I
have asked this many times yeti didnt get a proper answer

Anshu Agrawal · Accepted Answer

Dear student, The given nuclear reaction is:

m’ = Respective nuclear masses If atomic masses are used instead of nuclear masses, then we have to add 6 me in the case of 'Cand 5 me in the case of 'B

Q=Ed+Ev+Ee The daughter nucleus is too heavy compared to e+ and v , so it carries negligible energy Ed =0, if the kinetic energy carried by the neutrino is minimum (zero), the positron carries maximum energy and this is equal to Q Regards