The Importance of Isotopic Purity in Nuclear Weapons

The main thing is that they emit neutrons. Those higher forms of plutonium. And the RBM case styles allow you to cook the plutonium to just the 230. It was developed more as a dual use. So why is the isotopic purity of the plutonium important? What happens with that plutonium? 240, 241, 42. I heard about a fizzle. I can do a fizzling. Yeah.