[bgvrofg]

That is an interesting idea, as far as I know you can radiate something and not have it become radioactive.

I wonder what is the real reason it is not used, maybe it decomposes the food after a while?

Apparently it is used in some cases ( very interesting [0] ), but looks like the fear is still big.

[0]:https://en.wikipedia.org/wiki/Food_irradiation

[DanBC]

The real reason it's not used is because people do mot understand radiation and fear it in all its forms.