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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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