Question
Medium
Solving time: 4 mins
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.
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Text solutionVerified
Consider the competing processes:
(positron cature)
(electron capture)
This means implies , but does not necessarily mean .
(positron cature)
(electron capture)
This means implies , but does not necessarily mean .
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Question Text | 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. |
Topic | Nuclei |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 68 |