Re: Safety sheet, revised

• To: tesla-at-pupman-dot-com
• Subject: Re: Safety sheet, revised
• From: David Trimmell <dwt-at-efn-dot-org>
• Date: Thu, 08 Aug 1996 17:26:17 -0700

Chip wrote:

"Shielding
        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.

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