1.

Tritium is an isotope of hydrogen whose nucleus triton contains 2 neutrons and 1 proton. Free neutrons decay into p+e^(-)+barV. If one of the neutrons in triton decays, then it would transform into He^(3) nucleus. This does not happen. This is because

Answer»

Triton energy is less than that of a `He^3` nucleus
The ELECTRON CREATED in the BETA decay process cannot remain in the nucleus
both the neutrons in triton have a decay simultaneously RESULTING in a nucleus with 3 PROTONS which is not a `He^3`nucleus .
because free neutrons decay due to external perturbations which is absent in a triton nucleus .

Answer :a


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