Q. 224.0( 6 Votes )

For the β + (posi

Answer :

The reaction for the electron capture process is given by:


The reaction for the β + emission is given by:



Considering the atomic mass of the nucleus we get the following Q value equations.


QA =


=


And similarly,


QB = m


=


Here from these two equations we can see if QB > 0, then QA > 0 But, If QA > 0 that doesn’t imply QB > 0


Which means, if β + emission is energetically allowed, electron capture is necessarily allowed but not vice–versa.


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