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Re: AW: Xenolite Protective clothing



NOTE: the reference below refers to Titanium and NOT Tungsten - W is

considerably higher density than lead.



John Jacobus wrote:

> 

> Technically, you can use any various materials to

> provide shielding.  Many are composites of more than

> one.  Tungsten is in "vogue" as it has become cheaper

> due, I believe, to increased production by the

> Chinese. However, you have to make up the attenuation

> properties of lead with more of the material.

> http://hps.org/publicinformation/ate/q1742.html

> 

> Again, the advantage of using non-lead aprons, gloves,

> etc., is the generation of non-hazardous waste.  There

> is a disposal concern with lead, not barium.

> 

> --- Franz Schönhofer <franz.schoenhofer@chello.at>

> wrote:

> 

> > Dear Ed, dear John,

> >

> > I do not know for sure, whether lead aprons should

> > be replaced by other

> > materials, the only reason I can think of, is that

> > "lead" is toxic.

> >

> > So is barium! "Barium" is a metal, which would react

> > probably violently

> > with oxigen and water. I would believe that barium

> > sulphate might be

> > used in whatever matrix. I cannot believe that its

> > use in aprons would

> > be comparable to lead. Tungsten (Wolfram in German)

> > has a high

> > absorption possibility, is (has been) used in

> > weapons for high

> > penetration capability just as depleted uranium. I

> > guess that tungsten

> > will be much more expensive than lead and its

> > shielding efficiency would

> > be considerably less than for lead.

> >

> >

> > So why should one replace the good old lead aprons

> > with less efficient

> > and similarily "poisonous" materials?

> >

> >

> >

> > Franz Schoenhofer

> > PhD, MR iR

> > Habicherg. 31/7

> > A-1160 Vienna

> > AUSTRIA

> > phone -43-0699-1168-1319

> >

> >

> --------------------------------------------------------------------

> >

> > > -----Ursprüngliche Nachricht-----

> > > Von: owner-radsafe@list.vanderbilt.edu

> > [mailto:owner-

> > > radsafe@list.vanderbilt.edu] Im Auftrag von John

> > Jacobus

> > > Gesendet: Freitag, 03. Dezember 2004 00:17

> > > An: Baratta, Edmond J; radsafe@list.vanderbilt.edu

> > > Betreff: Re: Xenolite Protective clothing

> > >

> > > The material is made from barium and wolfram

> > > (tungsten)

> > >

> > > http://www.scanrad.no/Xenolite.htm

> > >

> > > Also, try

> > > http://www.apc-cardiovascular.co.uk/xenolite.htm

> > >

> > >

> > > --- "Baratta, Edmond J" <EBARATTA@ORA.FDA.GOV>

> > wrote:

> > >

> > > > Does anyone have any information about Xenolite

> > > > Protective clothing  It

> > > > supposedly is used to replace lead aprons and

> > other

> > > > protective clothing.

> > > >

> > > >

> > > >

> > > > Thanks,

> > > >

> > > >

> > > >

> > > > Ed

> > > >

> > > >

> > > >

> > > > Edmond J. Baratta

> > > >

> > > > Radiation Safety Officer

> > > >

> > > > Tel. No. 781-729-5700, ext 728

> > > >

> > > > FAX: 781-729-3593

> > > >

> > > >

> > > >

> > > >

> > >

> > >

> > > =====

> > > +++++++++++++++++++

> > > "That government is the strongest of which every

> > man feels himself a

> > > part."

> > > Thomas Jefferson

> > >

> > > -- John

> > > John Jacobus, MS

> > > Certified Health Physicist

> > > e-mail:  crispy_bird@yahoo.com

> > >

> > > __________________________________________________

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> 

> =====

> +++++++++++++++++++

> "That government is the strongest of which every man feels himself a part."

> Thomas Jefferson

> 

> -- John

> John Jacobus, MS

> Certified Health Physicist

> e-mail:  crispy_bird@yahoo.com

> 

> 

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