In Gamma-Decay a Nucleus in an Excited State Decays to a Lower

Multiple Choice

In gamma-decay a nucleus in an excited state decays to a lower energy state by the emission of a high energy photon called a gamma-ray.

A) Gamma-decay is always slow (greater than a ns) .
B) Gamma-decay is always fast (less than a ns) .
C) Gamma-decay is usually fast but can in special cases be slow.
D) Gamma-decay is always accompanied by the emission of a neutrino.
E) Gamma-decay is always accompanied by the emission of a $\beta$ -particle.