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Beta Decay

In an electro...

Question

In an electron capture, electron from K shell falls into a nucleus to undergo beta decay.

A

False

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B

True

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Solution

The correct option is B True

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Q. In an electron capture, electron from K shell falls into a nucleus to undergo beta decay.

β^{+}

(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).

e^{+} +_{Z}^{A} X \to_{Z - 1}^{A} Y + v

β^{+}

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

Q. For the β+(positron) emission from a nucleus, there is anothercompeting process known as electron capture (electron from an innerorbit, say, the K–shell, is captured by the nucleus and a neutrino isemitted).1A A e X Y Z Z ν++ → + −Show that if β+emission is energetically allowed, electron captureis necessarily allowed but not vice–versa.

Q. During a negative beta decay,
(a) an atomic electron is ejected
(b) an electron which is already present within the nucleus is ejected
(c) a neutron in the nucleus decays emitting an electron
(d) a proton in the nucleus decays emitting an electron.

During a negative beta decay, a neutron in the nucleus decays emitting an electron.

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