[Isotope-prod] [EXTERNAL] Re: CERN Courier article

[Sundaresan Gobalakrishnan]

Hi all,

Also see the attached article in this regard.

Best regards,
Sundaresan


From: Isotope-prod [mailto:isotope-prod-bounces at jlab.org] On Behalf Of Pavel Degtiarenko
Sent: Tuesday, May 03, 2016 5:30 PM
To: isotope-prod at jlab.org
Subject: [EXTERNAL] Re: [Isotope-prod] CERN Courier article

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

 [cid:image001.png at 01D1A567.A82003E0]




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