[Isotope-prod] CERN Courier article

[Pavel Degtiarenko]

Hi All,

Technically these Tb isotopes are not alpha emitters.
However, Tb-152 decays to Gd-152, which emits alphas (but the half-life 
is ~10^14 Yrs)
Tb-152 (17.5h) has a 344 keV gamma line
Tb-155 (5.3d) has 86 keV and 105 keV lines

I do not see a comfortable path to get those in gamma-nuclear reactions.
They are pretty far from the major stable nuclei
Tb-159(100%) can be used - but it's a lot of neutrons to detach (and it 
will be bad specific activity)
Dy-156(0.056%) targets would need severe isotope separation (that would 
be a good candidate target if we can get it).

Tb-149 is an alpha emitter, but it's way too far from stability

Tb-161(6.9d, beta- 138 and 157 keV, x-rays) is listed as perspective R&D 
isotope in 
https://cas.web.cern.ch/cas/Austria2015/Lectures/6Wed03/Koester.pdf
That one can be obtained from Dy-162(25%) in a (gamma,p) reaction 
relatively cleanly.

Pavel

On 05/03/2016 03:41 PM, Hutton Andrew wrote:
> Everyone
>
> I am attaching an article on a radioisotope that I have never heard 
> of.  Is it something we could produce here?
>
> Andrew
>
>
>
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