Re: Interaction of a relativistic projectile with a solid object

=2E> The charged nuclei beam will attract electrons from the surrounding
> matter, partially neutralizing its charge. =A0This allows the attractive
> force due to the interaction of the current of charged particles with
> itself to create a self-pinching effect, similar to what happens with
> other charged particle beams going through
matter.http://www.projectrho.co=
m/rocket/chap12.pdf

Thanks! Looks like I also greatly overestimated the amount of matter
needed to bring the billiard ball's nuclei to complete stop.