[Isotope-prod] [EXTERNAL] DOE-FOA

[Sundaresan Gobalakrishnan]

Dear Pavel,

Thanks for the info. I don't have all the details with me now but earlier here we discussed this as a way to make things work better. Will analyze this in depth soon.

Best regards,
Sundaresan




-------- Original Message --------
From: Pavel Degtiarenko <pavel at jlab.org>
Date: Thu, April 12, 2018 2:18 PM -0400
To: Sundaresan Gobalakrishnan <sundaresan.gobalakrishnan at vcuhealth.org>, isotope-prod at jlab.org
Subject: Re: [Isotope-prod] [EXTERNAL] DOE-FOA

Dear Sundaresun,

It's doubtful that the solid salt form presents an advantage in terms of heat management. As per Google, boiling point of Gallium Chloride is 201 C,  Gallium Bromide 279 C, Gallium Iodide 345 C, Gallium Sulfate 330 C, Gallium Nitrate melting point is 110 C. Depositing of 50 kW in the material will make it melt and vaporize.

Liquid Gallium metal stays liquid up to the temperature of 2400 C. This property is what makes it possible to work at high temperature gradients that allow the management and dissipation of the high beam power delivered.

Another disadvantage of salts is that significant portion of beam energy is spent on activation of elements other than Gallium.

How expensive would it be to convert metal gallium into the salt for easier purification?

Best regards,
Pavel

On 04/12/2018 01:33 PM, Sundaresan Gobalakrishnan wrote:
Dear Pavel,

This idea was originally propsed by Jamal, he included this as a future direction in our previous application (last paragraph, I think).

Gallium salts are commercially available (eg: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sigmaaldrich.com_materials-2Dscience_material-2Dscience-2Dproducts.html-3FTablePage-3D19295346&d=DwIF-g&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=NxrO0ug74rUvvjcutEs9KvyZh4ULTic71MVpELLWMu8&m=O4q5psNWchqGdG3tqOjPAITfKCYoAr5GBsb87UYWL78&s=rmVcoXAlvva54unqoi3N12NqqMUyhsVB9S00lSXxuZk&e= )  We don't have to convert liquid for this.

Salts can be made into a solid target, and its heat management during bombardment will be easier than liquid.

Purification will be lot more easier than with liquid target.

I am guessing it will be cost effective too.

Best regards,
Sundaresan

-------- Original Message --------
From: Isotope-prod <isotope-prod-bounces at jlab.org><mailto:isotope-prod-bounces at jlab.org> on behalf of Pavel Degtiarenko <pavel at jlab.org><mailto:pavel at jlab.org>
Date: Thu, April 12, 2018 1:26 PM -0400
To: isotope-prod at jlab.org<mailto:isotope-prod at jlab.org>
Subject: Re: [Isotope-prod] [EXTERNAL] DOE-FOA

Dear Sundaresan,

Could you please list advantages of using the salts, just briefly for non-professionals.
And how difficult would it be to convert 100 gram of liquid metal Gallium into a salt form.

Thanks, and best regards,
Pavel

On 04/12/2018 11:45 AM, Sundaresan Gobalakrishnan wrote:
Besides liquid Gallium, production of Cu-67 from Gallium salts could also be explored via the new application. Good opportunity.

Best regards,
Sundaresan


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