[Isotope-prod] [EXTERNAL] Re: Experiment in the injector

[Pavel Degtiarenko]

Hi Jamal,

Just checking:

1 microCurie is about 37 kHz in decays. Assuming 1% efficiency, it's 350 
Hz detector rate, quite a significant number of counts per second, may 
be even smaller rate would be fine if use few-minute detector runs. 
Could you educate me - why such dose rates are not acceptable.

If 1 microCurie is too low for us to get any useful information about 
the separation process then we should try to look for some other goals 
for the run.

Best regards,
Pavel

On 3/13/2017 2:57 PM, Jamal Zweit wrote:
>
> Pavel,
>
> A fraction of a uCi or a uCi level will only be useful for 
> non-destructive measurements, but will not be sufficient to assess 
> radioachemical separations, etc.
>
> JZ
>
> Jamal Zweit, PhD, DSc
>
> Professor of Radiology,
>
> Affiliate Professor of Radiation Oncology; Pathology; Biochemistry & 
> Molecular Biology; and Chemistry
>
> Director, Center for Molecular Imaging
>
> Department of Radiology
>
> School of Medicine
>
> Virginia Commonwealth University
>
> 1101 E. Marshall Street
>
> Sanger Hall, Room 8-022
>
> PO Box 980031
>
> Richmond, VA 23298-0031
>
> (804) 628 2791
>
> *From:*Pavel Degtiarenko [mailto:pavel at jlab.org]
> *Sent:* Monday, March 13, 2017 2:51 PM
> *To:* Jamal Zweit <jamal.zweit at vcuhealth.org>; Hari Areti 
> <areti at jlab.org>; isotope-prod <isotope-prod at jlab.org>; Douglas Wells 
> <douglas.wells at nmt.edu>
> *Subject:* Re: [EXTERNAL] Re: [Isotope-prod] Experiment in the injector
>
> Hi Jamal,
>
> Our target was about 25 gram of gallium.
>
> Will the samples with 0.1 - 1 microCi of Cu-67 still be useful to you?
> George will compile for us some realistic estimates and parameters 
> using the data from the first set of measurements, but the level of 
> production at 50 W beam is certainly expected to be small.
>
> Best regards,
> Pavel
>
>
>
> On 03/13/2017 01:57 PM, Jamal Zweit wrote:
>
>     From our side, we can use small amount of activity (even less than
>     a mCi) to do the experiments.
>
>     Pavel: How much Ga you are thinking of irradiating?
>
>     JZ
>
>     Jamal Zweit, PhD, DSc
>
>     Professor of Radiology,
>
>     Affiliate Professor of Radiation Oncology; Pathology; Biochemistry
>     & Molecular Biology; and Chemistry
>
>     Director, Center for Molecular Imaging
>
>     Department of Radiology
>
>     School of Medicine
>
>     Virginia Commonwealth University
>
>     1101 E. Marshall Street
>
>     Sanger Hall, Room 8-022
>
>     PO Box 980031
>
>     Richmond, VA 23298-0031
>
>     (804) 628 2791
>
>     *From:*Isotope-prod [mailto:isotope-prod-bounces at jlab.org] *On
>     Behalf Of *Pavel Degtiarenko
>     *Sent:* Monday, March 13, 2017 1:51 PM
>     *To:* Hari Areti <areti at jlab.org> <mailto:areti at jlab.org>;
>     isotope-prod <isotope-prod at jlab.org>
>     <mailto:isotope-prod at jlab.org>; Douglas Wells
>     <douglas.wells at nmt.edu> <mailto:douglas.wells at nmt.edu>
>     *Subject:* [EXTERNAL] Re: [Isotope-prod] Experiment in the injector
>
>     Kevin had purchased a reasonably big jar of natural gallium. We
>     should still have the irradiated targets for re-use; all residual
>     activities in them are expected to be negligible by now. We should
>     keep the current limit as it was before, to make the approval
>     process easier. For the beam time estimate it would be good to
>     hear from VCU about the range of Cu-67 activity that is best for
>     their studies, and see if we can make it (including shipping
>     arrangements). Better knowledge of beam energy and position is
>     important. I would consider a request for the line modification if
>     needed to make these measurements reliable.
>
>     Best regards,
>     Pavel
>
>
>     On 3/13/2017 1:20 PM, Hari Areti wrote:
>
>
>         I am going to ask Ops for time at the injector for irradiating
>         Gallium.
>
>         Let is fix a few things and work out the logistics.
>
>         Requisites:
>
>         Do we have enough target material? (PD, GK)
>
>         Do we have BNNT holders? (KJ)
>
>         Beam parameters
>
>         1. Beam Energy 18.5 MeV
>
>         2. Beam current ?
>
>         3. Beam time?
>
>         Logistics
>
>         Test plan ( revive the previous one, if we had one)
>
>         Do we have the means to measure energy and beam size? (I will
>         check)
>
>         Assuming that VCU collaborators have time, how do we ship the
>
>         irradiated sample?
>
>         Anything else?
>
>         Once our thoughts are organized, should we meet (even on the
>         phone)
>
>         for a few minutes to organize the experiment?
>
>         Thanks.
>
>         -H
>
>
>
>
>
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