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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Here is a potentially-useful patent on Ra purification that is relevant to this discussion, though the authors envision charge-particle reactions rather than
photo-nuclear:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.google.com/patents/US8153087">http://www.google.com/patents/US8153087</a><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Isotope-prod [mailto:isotope-prod-bounces@jlab.org]
<b>On Behalf Of </b>Wells, Douglas P.<br>
<b>Sent:</b> Thursday, November 05, 2015 2:40 PM<br>
<b>To:</b> Hari Areti; Andrew Hutton<br>
<b>Cc:</b> Neil George<br>
<b>Subject:</b> Re: [Isotope-prod] Isotopes<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Have we asked ourselves, in the case of 226Ra targets, how pure we have to be? The thing about “milking” 225Ac from 225Ra is that the “milking” chemistry
process (depending on the process) might exclude common contaminants of Ra. Indeed, we certainly do not need enriched Ra and
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">might</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> not even need very high purity Ra.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Just a thought.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">D<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Isotope-prod [<a href="mailto:isotope-prod-bounces@jlab.org">mailto:isotope-prod-bounces@jlab.org</a>]
<b>On Behalf Of </b>Hari Areti<br>
<b>Sent:</b> Thursday, November 05, 2015 2:09 PM<br>
<b>To:</b> Andrew Hutton<br>
<b>Cc:</b> Neil George<br>
<b>Subject:</b> Re: [Isotope-prod] Isotopes<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Dear Andrew,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Thanks for the encouraging information. Last time I contacted Dennis, he could not come up<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">with a radium source. I will contact him regarding Th-230 and see whether he can help.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">-H<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial","sans-serif";color:black">From:
</span></b><span style="font-family:"Arial","sans-serif";color:black">"Andrew Hutton" <<a href="mailto:andrew@jlab.org">andrew@jlab.org</a>><br>
<b>To: </b>"Neil George" <<a href="mailto:Isotope-prod@jlab.org">Isotope-prod@jlab.org</a>><br>
<b>Cc: </b>"Hari Areti" <<a href="mailto:areti@jlab.org">areti@jlab.org</a>><br>
<b>Sent: </b>Thursday, November 5, 2015 3:45:15 PM<br>
<b>Subject: </b>Isotopes<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">George<br>
<br>
I was able to speak to Jehanne today, so I told her the progress you are making on Isotopes. Her comments:<br>
<br>
Argonne is making a push to make Cu67 with their low energy (copper) linac. I think (but did not get confirmation) that this is using Zinc. She would be interested in our proposal as it is completely different. <br>
<br>
I told her about our concerns about the cost of Radium to make Actinium 225. She said that they are currently making Ac225 by milking Thorium from the weapons program. She stated that she has access to all of the weapons stockpile so if there is an isotope
that we are interested in, we should ask Dennis Phillips as he is the Isotope R&D Manager. He is also in charge of the Actinium225 program, so she strongly encouraged us to talk to him. <br>
<br>
Jehanne seemed excited that we are making progress and is waiting eagerly for our ideas. <br>
<br>
Hope this helps.<br>
<br>
Andrew<o:p></o:p></span></p>
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