[Isotope-prod] 18.5 MeV test - preliminary results

[Andrew Hutton]

George K, Kevin

As Hari put it so eloquently, this was an excellent effort all round.  We now can be sure that the gallium route to Cu67 production is feasible; the remaining factor of two discrepancy can be studied with future funding - which this measurement makes more likely!

Thanks

Andrew

> On Jun 16, 2016, at 1:40 AM, Hari Areti <areti at jlab.org <mailto:areti at jlab.org>> wrote:
> 
> Dear George,
> Now we know that we can use Ga target.  As you say, there could be many reasons for
> the discrepancy. An obvious ones to me are the alignment error, amount of target material,
> assumed purity of the target, etc.
> 
> Let me take the opportunity to say how impressed I am with you for the relentless effort
> you put in to make this test happen. After being turned away from one hall and then the
> other, you persisted, carried out simulations and the test plans and more. Thanks to Kevin
> for making things happen at lightening speed.
> 
> -H
> 
> 
> From: "George Kharashvili" <georgek at jlab.org <mailto:georgek at jlab.org>>
> To: "isotope-prod" <isotope-prod at jlab.org <mailto:isotope-prod at jlab.org>>
> Sent: Wednesday, June 15, 2016 11:31:37 AM
> Subject: [Isotope-prod] 18.5 MeV test - preliminary results
> 
> The first look at the gallium activation test suggests that we produced ~4500 Bq of Cu-67. 
> Irradiation was done using 18.5 MeV beam on 1mm W radiator for 1 hour at average current of 2.5 microA, or 46 W-h. We had predicted 7000 Bq production in a 50 W-h irradiation. There are several differences between the model and irradiation, so I need to rerun the model and do a little more detailed analysis of the sample.
> More to follow during the next couple of days.
> 
> --
> George Kharashvili
> Jefferson Lab Radiation Control
> 757-269-6435
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