The Sigma male is often seen as a quieter version of the Alpha ... The six male archetypes—Alpha, Beta, Delta, Gamma, Omega, and Sigma—offer fascinating insights into the diverse personalities ...

"It does follow from that naming convention we introduced with Alpha," McCrindle said ... sequential path — Beta, Gamma, Delta, and so on, he said. The name itself has no inherent meaning ...

Gamma delta T cells are a distinct subset of T cells that possess the ability to target and destroy tumor cells, similar to traditional alpha-beta T cells, but with several key advantages.

After emitting an alpha or beta particle, the nucleus will often still be ‘excited’ and will need to lose energy. It does this by emitting a high energy electromagnetic wave called a gamma ray.