Re: Spectral Analysis

[AndrewsJP@AOL.COM]

In a message dated 11/1/2001 2:56:33 PM Eastern Standard Time, Perrero@IDNS.STATE.IL.US writes:



> This is definitely not my strong suite so any help here is appreciated.  The
>
> situation involves a field test using a portable MCA.  Field readings give
>
> dose rates of approximately 100 mr/h near contact and 10 mr/h at a foot from
>
> a discrete source with no markings.  However a limited time (approx  5 min)
>
> NaI spectra out to 2.5 MeV does not show a discernible peak.   What type of
>
> nuclide could be producing these readings?  If a beta emitter was here
>
> wouldn't there at least be an x-ray peak produced from the capsule material?


Sounds like it might be Sr-90.


John Andrews

Knoxville, Tennessee