For the \beta^+ (positron) emission from a nucleus, there is anoth | Filo
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Class 12


Cell: Structure and Functions


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For the (positron) emission from a nucleus, there is another competing process known as electron capture (electron from an inner orbit, say, the K shell, is captured by the nucleus and a neutrino is emitted).

Show that if  emission is energetically allowed, electron capture is necessarily allowed but not vice versa.

Solution: Consider the competing processes:
(positron cature)
(electron capture)

This means implies , but  does not necessarily mean 
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