It occurs to me that in Marvel Comics while there are lots of gamma empowered characters, cosmic ray empowered characters seem to be much rarer. The Fantastic Four and their old nemesis the Red Ghost and his three Super Apes are the only ones I can think of. Are there any others? (I’m not sure if “The Power Cosmic” bestowed on the Silver Surfer and other Heralds of Galactus is the same thing).
The Power Cosmic is something entirely different.
The U-Foes are another cosmic ray empowered villain group, who more-or-less successfully tried to duplicate the Fantastic Four’s empowerment.
As a little kid, I’d actually look up Comic Book Plot Points like Cosmic Rays and Gamma Particles, and taught myself some science in the process.
And I remember saying “Wow, Bruce Banner should be dead by now!” when I realized that those grown-ups (my up-until-then heroes, the Marvel writers) were playing around with very dangerous forces.