[13ren]

Sorry, that was a suggestion phrased as a question (i.e. I know what isotopes are). I was suggesting a name that signifies operational properties rather than "the" definition of what it is. If heavy water became commonly available, this would undoubtedly occur.

It's like features vs. benefits, which I've been working with over a few weeks, to understand the need for my product, and the gaps left by existing offers in the marketplace. Quite possibly, I'm thinking too much in those terms :-)