User blog comment:Freadliest warrior/Godzilla vs Gamera is HERE/@comment-5527544-20140820002836/@comment-25285745-20140820004429

The force of Godzilla's atomic beam is just too strong for Gamera to absorb, plus Godzilla's beam is pure plasma, while only fire and plutonium could actually empower Gamera. Plus if you look closely, Gamera was attempting his fireball ejection suicide attack, which is why Godzilla pushed him away with his beam before he exploded near enough to harm him.