Re: Ir-192 liquid source

["Mike Malaxos" <mike@radiationsafety.com.au>]

Can Cs 137 be used instead Ir 192.  We made low level sources (5 -80 Bq)
from a trace of Cs 137 contamination as CsCl dissolved in distilled water.
We measured  the activity of 10 cc of the solution evaporated onto a
planchette to obtain the specific activity. We then dispensed the required
volume to obtain the required activity onto shallow 25 mm diameter container
which had the bottom coated with a thin fresh layer of silicon adhesive.
When it set we had a stable beta gamma Cs 137 source. Please let me know if
it does the job.

Best Regards,
Mike Malaxos.
Radiation Safety Services
Mike@radiationsafety.com.au
69 Robinson Avenue Belmont Western Australia 6104
Phone 61 (0)8 94750011 FAX  61 (0)8 94750011


-----Original Message-----
From: Sarah Hayes <sjhayes@MIT.EDU>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Date: 20 August 1999 12:53
Subject: Ir-192 liquid source


>I'm looking for a source of Ir-192, liquid form, about 10 microcuries total
>activity.  My ultimate goal is to create a set of standards which will be
>used to calibrate a whole body counter which has been donated to U Mass
>Lowell.  I already have some iridium acetyl-acetonate at my disposal, but
>it is in a powder form and is also a serious chemical hazard, so I don't
>want to use it unless it's absolutely necessary.  I've tried several
>manufacturers so far, and have come up with nothing.  This is for my
>master's project, so if anyone has any suggestions or ideas on where to
>acquire this material I would greatly appreciate your assistance.  Thanks
>very much!
>
>Sarah Hayes
>
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