When a sample of a radioactive isotope decays by 
-particle emission, the -particles emitted have a single discrete energy. When a sample of a radioactive isotope decays by 
particle emission, the particles emitted have a continuous range of energies. What is the explanation for this?
An antineutrino is emitted with a particle but not with an -particle.
An antineutrino is emitted with an -particle but not with a particle.
The -particles have much more energy than the particles.
The particles have much more energy than the -particles.
