Re: Fe-55

["baumbaug@nosc.mil" <baumbaug@nosc.mil>]

        I'll reply to "radafe" in case others can use the information...

   Al,

        My current employer does not use Fe-55, but my last employer (a
university) had a number of laboratories which did.  I found that a Ludlum-3
survey meter with a low energy (44-3) scintillation probe was able to detect
the Fe-55 x-rays pretty easily...  LSC efficiency was about 35% max (of
course without quenching, etc.).  Some of the labs were able to switch to
Fe-59 which also has a "good" high energy beta and lots of gammas.  It shows
up well with a pancake probe, scintillation probe and 100% efficiency on the
LSC.  You might try this route with your researcher...

        Hope this helps,

        Joel


At 01:10 PM 8/19/97 -0500, you wrote:
>
>We have a researcher that is going to start using Fe-55 for some transport
>assays. I am not very familiar with this nuclide and was hoping I could get
some
>specifics on it. The Rad Health Handbook states "Mn x-rays, continuous
>bremsstrahlung to 0.23" MeV (occuring at 0.004%).
>How would one detect this. Gamma spec, LSC? Could you use a NaI or G-M survey
>instrument in the lab to survey? Any help would be greatly appreciated.
>
>Thanks in advance for your help.
>
>Al Castellane
>Oregon Health Sciences University
>castella@ohsu.edu

>
>
Joel T. Baumbaugh (baumbaug@nosc.mil)
Naval Research and Development (NRaD)
San Diego, CA., U.S.A.

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