cascade particle

The cascading particles made soft, ticking sounds as Mateo slowly climbed down.

They are sometimes called the cascade particles because of their unstable state, they decay rapidly into lighter particles through a chain of decays.

Needless to say, this quality will be priceless in an environment where energies are on the scale of tera-electron volts, which will produce cascading particle creations and annihilations which in turn will release tremendous energies.