radiation is a kind of process
nuclear_radiation_process is not emitting. gamma_ray is nuclear_radiation_process. radiation is spread. radiation is natural_process. nuclear_radiation_process is not micro_physical_process. nuclear_radiation_process is nuclear_process. radiation is not natural_process. nuclear_radiation_process is emitting. nuclear_radiation_process is micro_physical_process. nuclear_radiation_process is not nuclear_process.