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Question

A small subatomic particle was passed through large water tank containing Cd. The existence of this particle was inferred when two γ-rays were produced and a neutron was captured by Cd. The particle was :

A
proton
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B
anti neutrino
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C
electron
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D
neutrino
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Solution

The correct option is D neutrino
Neutrinos with an energy above the thresholdcaused charged current decay interactions with the protons in the water, producing neutrons and γ rays.

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