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

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

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.).
 >