[Isotope-prod] Th-230 target

[Pavel Degtiarenko]

Hi All,

Continuing to play with the concept of "Low Energy / High Power" 
irradiation facility, I think such solution could be indeed attractive 
and convenient, because of low overall setup activation, and much lower 
prompt neutron backgrounds, - compared to high energy / high power 
solutions. The patented solution for the high power radiator/absorber 
fits well in the setup. So we'll just need to get a kilogram or so of 
Th-230 from Oak Ridge or Los Alamos...  Or few grams of Ra226...

By the way, people from Oak Ridge tried to patent Th-229 production in 
(g,n) reaction on Th-230 in 2007. It looks like the patent wasn't 
granted, but they somehow included the (g,n) "embodiment" in a different 
patent related to other process, Th-229 production on Th-230 by 
energetic alpha particles. No claims related to (g,n) are in the patent. 
So for us the patentability issue seems to be not resolved / needs 
further patent research.

Best regards,
Pavel


On 10/6/2015 12:20 AM, Pavel Degtiarenko wrote:
> Hi All,
> I did some testing of the model for Ac-225 production on Th-230 target 
> at 12 MeV. Please see the attached PowerPoint (the results should be 
> viewed in "Presentation Mode" full screen to see different decay 
> times). Some features are attractive: (1) generally low radiation 
> levels after irradiation, (2) no U-233 produced, and (3) producing the 
> "milking cow", Th-229 will generate Ac-225 steadily for thousands of 
> years. May be someone would know where to get 500 gram of Th-230 and 
> how much will it cost....
> Best regards,
> Pavel
>

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