A nucleus of mass 220 amu in the free st...

A nucleus of mass 220 amu in the free state decays to emit an `alpha`-particle . Kinetic energy of the `alpha`-particle emitted is 5.4 MeV. The recoil energy of the daughter nucleus is

0.25 MeV

0.5 Mev

0.1 MeV

0.75 MeV

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