Re: Safety sheet, revised

Chip wrote:

        The best materials are lead or depleted
(nonradioactive) uranium."

Just a small corection: depleted urainium is not non-radioactive, it has
only been depleted of the fissionable isotope U-235, leaving the most
common isotope U-238 ~99.x% behind. U-238 has a half-life of 4.5x10^9
Years, decaying by alpha emission and emitting low energy Gamma. But,
yes it is used as shielding due to it's high Z number (density), only
with a slape of lead to shield the low energy gamma's though.