Question

Gamma decay multipolar transition rate?

Answer 1

Gamma decay multipolar transition rate actually this refers to the information of Gamma decay this means :
¤ it is the type of radioactivity in which some unstable atomic nuclei dissipate excessive energy from it and it is said to be transition rate because it varies.

Answer 2

In quantum mechanics, gamma decay is expressed as a transition from an excited to a ground state of a nucleus.