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<div class="moz-cite-prefix">Hi All,<br>
<br>
Technically these Tb isotopes are not alpha emitters. <br>
However, Tb-152 decays to Gd-152, which emits alphas (but the
half-life is ~10^14 Yrs)<br>
Tb-152 (17.5h) has a 344 keV gamma line<br>
Tb-155 (5.3d) has 86 keV and 105 keV lines<br>
<br>
I do not see a comfortable path to get those in gamma-nuclear
reactions.<br>
They are pretty far from the major stable nuclei<br>
Tb-159(100%) can be used - but it's a lot of neutrons to detach
(and it will be bad specific activity)<br>
Dy-156(0.056%) targets would need severe isotope separation (that
would be a good candidate target if we can get it).<br>
<br>
Tb-149 is an alpha emitter, but it's way too far from stability<br>
<br>
Tb-161(6.9d, beta- 138 and 157 keV, x-rays) is listed as
perspective R&D isotope in
<a class="moz-txt-link-freetext" href="https://cas.web.cern.ch/cas/Austria2015/Lectures/6Wed03/Koester.pdf">https://cas.web.cern.ch/cas/Austria2015/Lectures/6Wed03/Koester.pdf</a><br>
That one can be obtained from Dy-162(25%) in a (gamma,p) reaction
relatively cleanly.<br>
<br>
Pavel<br>
<br>
On 05/03/2016 03:41 PM, Hutton Andrew wrote:<br>
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<blockquote cite="mid:B8E6D7BA-AA5D-44F6-A7FF-6157D2E38458@jlab.org"
type="cite">
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Everyone
<div class=""><br class="">
</div>
<div class="">I am attaching an article on a radioisotope that I
have never heard of. Is it something we could produce here? </div>
<div class=""><br class="">
</div>
<div class="">Andrew</div>
<div class=""><br class="">
</div>
<div class=""> <img apple-width="yes" apple-height="yes"
apple-inline="yes" id="7C506926-F92D-49CA-8DDD-B2AD3E44E32E"
src="cid:part1.07060204.06060208@jlab.org" class=""
height="325" width="418"></div>
<br>
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