>>105262422Captain Atom blew up in some of Loebs' Superman/Batman (~2003), and he was next seen in that Wildstorm miniseries in 2005/6.
He returned to the main DCU in Infinite Crisis #7, in the irradiated remains of Bludhaven. He was in a coma for almost the entirety of that VERY violent "Battle for Bludhaven) miniseries, and I remember there was a page of a bunch of corpses around him of people trying to recover his remains over the months of the missing year.
The Atomic Knights plugged him into a new suit, and he ABSORBED Major Force before exploding again.