Re: possible sources for sheet lead and mineral/ transformer oil?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jack Vandam" <snotoir7674g-at-mindspring-dot-com> 

This is especially true with radiation released from hard radiation sources,
like with nuclear reactor shielding.  However, I have never heard of post
radiation release from lead after being exposed to x-rays.  Perhaps after
repeated high energy exposures, that may be the case.

Jack

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, October 08, 2004 9:31 AM
Subject: RE: possible sources for sheet lead and mineral/ transformer oil?


 > Original poster: "Gary Weaver" <gary350-at-earthlink-dot-net>
 >
 > WARNING.  Lead from an e-ray room in a hospital or any other lead used as
a
 > shield will hold the radiation and release it in very small harmless
 > amounts over a long period of time.  But if you melt that same lead it
 > releases all the radiation that has been captured by the lead in a few
 > seconds.   This can cause you to receive an over dose of radiation.
 >
 > Gary Weaver
 >
 >
 >
 >
 >  > [Original Message]
 >  > From: Tesla list <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Date: 10/7/2004 9:24:39 AM
 >  > Subject: RE: possible sources for sheet lead and mineral/ transformer
oil?
 >  >
 >  > Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com>
 >  >
 >  > Soft x-rays are significantly "reduced" by many low Z materials. By
soft
 >  > I would mean <20KeV.
 >  >
 >  > Regards,
 >  >
 >  > David Trimmell
 >  >
 >  > -----Original Message-----
 >  > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 >  > Sent: Wednesday, October 06, 2004 9:57 PM
 >  > To: tesla-at-pupman-dot-com
 >  > Subject: Re: possible sources for sheet lead and mineral/ transformer
 >  > oil?
 >  >
 >  > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >  >
 >  > At 05:47 PM 10/6/2004 -0600, you wrote:
 >  >  >Original poster: humanb-at-chaoticuniverse-dot-com
 >  >  >Hi, well I looked up the price for sheet lead at McMaster Carr and
here
 >  > is
 >  >  >what I found:
 >  >  >
 >  >  >12" x 24" X 0.042" are $19.56 Each. Part Number 9032K119.
 >  >  >
 >  >  >I am also going to be doing some radiation shielding and would like
to
 >  >  >note that this thickness of lead is just over two "tenth value"
 >  >  >thicknesses (0.039") for 70 KeV x-rays. What this means is that one
 >  > layer
 >  >  >of this material will reduce the radiation levels by 100, for
instance,
 >  > if
 >  >  >you have a tube putting out 10 R/minute this will reduce the exposure
 >  > rate
 >  >  >to 100mR/minute. Then use the inverse square law for exposure at a
 >  > given
 >  >  >distance.
 >  >  >
 >  >  >Also remember that it is a very good idea to ware safety glasses when
 >  >  >experimenting with Tesla coils and vacuum tubes, as they protect
 >  > against
 >  >  >not only shattering glass, but also against "soft" x-rays. Soft
x-rays
 >  > can
 >  >  >cause cataracts in the cornea.
 >  >
 >  > Uhh... which safety glasses will stop soft x-rays?  The usual
 >  > polycarbonate
 >  > won't stop much of anything energetic (except perhaps neutrons, which
it
 >  >
 >  > might slow down a bit).  Most glass won't stop xrays, unless it's been
 >  > loaded with something (iron, lead, etc.).
 >  >
 >
 >