Subject: Could the future spaceship be shielded from Ultrahigh energy cosmic rays?

I read in one of your archieves that spacecraft can be damaged if they 
encounter ultrahigh energy cosmic rays, however could we shield such a 
spaceship? Is it at least theoretically possible to shield a spacecraft from 
ultrahigh energy cosmic ray impact by making the walls very dense and thick, or 
use some new types of material that can heal themselves, or any other means?

Re: Could the future spaceship be shielded from Ultrahigh energy cosmic rays?