Which of the following is not produced by nuclear decay?

A) Alpha particles

B) Beta particles

C) Gamma rays

D) Delta particles

The answer is D. Delta particles.

Currently, there are three main types of nuclear decay: alpha decay, beta decay, and gamma decay. All three involve the emission of certain radioactive particles from the nuclear decay of an unstable atom. These particles are the alpha particles, beta particles, gamma rays, and conversion electrons.