RE: I-129 Sources

["North, David" <DNorth@Lifespan.org>]

According to NCRP Report No. 58, I-129 is indeed a gamma-emitter, but the
emission is relatively weak (7.5%). Most of the useful photons are x-rays
following the prevalent internal conversion after beta-minus decay.

David L. North, Sc.M. DABR
Associate Physicist
Department of Medical Physics
Rhode Island Hospital
593 Eddy St.
Providence, RI 02903
ph: (401)444-5961
fax: (401)444-4446
dnorth@lifespan.org


> ----------
> From: 	Franz Schoenhofer
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Wednesday, January 10, 2001 18:27
> To: 	Multiple recipients of list
> Subject: 	Re: I-129 Sources
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Perrero, Daren <Perrero@idns.state.il.us>
> An: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
> Datum: Mittwoch, 10. Jänner 2001 23:05
> Betreff: RE: I-129 Sources
> 
> 
> >I believe what you are referring to is commonly called "a mock iodine"
> >source.  The I-129 is configured in such a way that the emitted spectrum
> >mimics that of I-125 but has the obvious advantage of the extended half
> life
> >of I-129.  Most gamma counter equipment vendors would be happy to link
> you
> >up with direct vendors or may even be able to provide such sources
> >themselves.
> 
> 
> "Mock Iodine" is not I-129, it cannot be, because I-129 is not a
> gamma-emitter. Somewhere deeply buried in my brain the information is
> stored, maybe it was Ba-133. Daren is right - the vendors can answer this
> questions.
> 
> Franz
> 
> 
> 
> 
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