[Isotope-prod] Possible opportunity

[Hari Areti]

Dear Pavel, 

I understand the 18.5 MeV exposure because Ga67 will be absent. 

However, if as you say that there was no Cu-64 at 56 MeV, does it not make sense to 
have an exposure at 56 MeV and have VCU separate out Ga-67 form Cu-67? This way 
we can have a good measurement of Cu-67 and Ga-67 and verify Fluka as an additional 
benefit. 

-H 


From: "Pavel Degtiarenko" <pavel at jlab.org> 
To: "isotope-prod" <isotope-prod at jlab.org>, "Hari Areti" <areti at jlab.org>, "douglas wells" <douglas.wells at nmt.edu>, "jamal zweit" <jamal.zweit at vcuhealth.org> 
Sent: Monday, March 13, 2017 10:24:45 AM 
Subject: Re: [Isotope-prod] Possible opportunity 

Dear Hari, 

George and I just had a brief discussion, and we think that might be a good opportunity to produce some real Cu-67 here for use at VCU. Last week we discussed purchasing some Cu-67 for tests of the VCU separation and spectroscopy equipment. By irradiation the natural Ga sample here at 18.5 MeV like we did last time, we can produce isotopically clean Cu-67 in gallium right here. After that we can measure its quantity reliably in the target without the separation (there will be no Ga-67 to interfere at this energy), then may be even try to do the test of the chemical process and see how much can be extracted. That would be up to VCU to decide what to do with the irradiated sample and what would be the reasonable Cu-67 activity for them to start the tests. On our side, we would like to have better prepared experiment, including the availability of the harps to measure beam position and energy precisely. 

As far as Cu-64 is concerned, we think that might be a second priority, because we already had a test at 56 MeV and reliably did not see it. Our present understanding is that the FLUKA simulation produces too much of Cu-64. This issue is being addressed to the FLUKA collaboration; we hope they will be interested to resolve it soon. 

Best regards, 
Pavel 



On 03/13/2017 09:42 AM, Hari Areti wrote: 





As you know, the accelerator is down to due to cold compressor fault 
which takes beam away from the experiments. Operations Department 
has a number of items they would like to do in the North Linac and that 
is the priority. 

We can request some beam time in the injector to look at Cu-64 production 
at a few energies >20 MeV. If we get a chance to do that, are we prepared? 

Thanks. 

-H 




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