I seem to recall a story from (maybe) an anthology in the late 80s or early 90s, about some teens or kids who discover an alien spacecraft in a mountain which explodes, killing everyone in the nearby town.
The explosion released a tremendous amount of radiation and preserved everyone's bodies.
The main character is a man who feels guilt over his role in the explosion, and had never told anyone except his friends, who were in the mountain at the time of the explosion.
He goes on to become an expert in this explosion. Eventually, he goes to kill himself by laying down in bed with his parents (who had died and were preserved by the explosion), removing his protective gear in order to do so.