Re: Fwd: Re: mcnp-forum: PuBe13 Physical Properties

[Ted de Castro <tdc@XRAYTED.COM>]

Radiographs we have taken of our Mound PuBe sources show them to be

considerably non uniform in density - so I doubt you will find a

reliable number for density.



"Erik F. Shores" wrote:

> 

> Good afternoon--

> 

> This request from another list:

> 

> >>Hello all.  Does anyone have information on the density of the

> >>plutonium-beryllium intermetallic PuBe13?

> 

> earned my quick reply:

> 

> >My experience has shown this to be difficult number to track down. One

> >readily available reference I have [Stewart, L., "Neutron Spectrum and

> >Absolute Yield of Plutonium-Beryllium Source," Phys Rev, 98, 740 (1955)]

> >lists it as 3.7 g/cc.

> >

> >Be aware, however, that such neutron sources have varying density values

> >resulting from production and a quoted value is probably for a specific

> >source. Highlighting that variation, another reference [Nuclear

> >Technology, 120, 19 (1997)] uses a value of 4.35 g/cc.

> 

> As such sources are periodically mentioned here (usually in terms of

> spectra), I thought this might be of interest. In addition, I thought I'd

> try to drum up additional references for my collection--and to forward to

> the initial requester. Does any RADSAFER have a readily available density

> value for the PuBe compound? If so, could you please forward it to me?

> Thank you!

> 

> Regards,

> Erik

> ________________________________________

> Erik F. Shores

> Los Alamos National Laboratory

> ESH-12, Radiological Engineering Team

> Mailto:eshores@lanl.gov

> 505.665.7643 (phone)

> 505.667.9726 (facsimile)

> 

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