Re: AW: Xenolite Protective clothing

[John Jacobus <crispy_bird@YAHOO.COM>]

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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