Re: Deadly Plutonium ?

["Bjorn Cedervall" <bcradsafers@hotmail.com>]

>Actually, there must be some atoms of Pu-239 in all natural uranium and 
>older DU since both U-239 and U-235 undergo spontaneous fission (at a low 
>rates) which produces high energy neutrons that can be captured by U-238 
>yielding U-239 which decays to Np-239 and then to Pu-239.

I have an encyclopedia (at home in Sweden) from the 50:ies which mentions 
natural plutonium in the parts per billion range for some rock/soil 
materials.

Bjorn Cedervall   bcradsafers@hotmail.com
(today in Costa Mesa, Calif.)

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