Is a food preservation process that exposes food to radiation energy, preventing microbial growth.

Food irradiation is a food preservation process that exposes food to radiation energy, preventing microbial growth.

Food irradiation (the application of ionizing radiation to food) is a technology that improves the safety and extends the shelf life of foods by reducing or eliminating microorganisms and insects. Like pasteurizing milk and canning fruits and vegetables, irradiation can make food safer for the consumer

not sure if this is what you'r looking for eubacteria and archaebacteria