You are probably aware of that certain radioactive things glow, usually a soft green. But is there any way to add compounds or what have you to achieve a different color, say, orange?
I know Cherenkov radiation in water is a soft blue, but that's a product of the reactor rather than the fuel itself.
I can't even find anything on google images that show radioluminescence in colors other than green. This is specifically for a nuclear fuel, and different formulae are marked as different colors. Perhaps I'll ask about the fuel itself separately.