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Re: Isotopes in natural environment
Here are some possibilities, which I sometimes pick up on gamma spectrometry
blanks:
670.4 kev and 1592.7 kev: Tl-210, part of the U-238 decay chain
911.5 kev: Ac-228, part of the Th-232 decay chain.
The opinions expressed are strictly mine.
It's not about dose, it's about trust.
Curies forever.
Bill Lipton
liptonw@dteenergy.com
LAM HOI CHING wrote:
> Dear radsafers,
> Several peaks have been detected in the whole body counter, but some of
> the peaks I can't identify it now, could anybody give me the anwers.
> Thank you.
>
> Recorded peak in whole body counter by Ge detector Isotope
> ----------------------------------------------------------------------
> ------------
> 352.2 keV
> Pb-214 ( Ra B)
> 609.4keV
> Bi-214 (Ra C)
> 1764.4keV
> Bi-214 (RaC)
>
> 670.4keV
> unknown
> 911.5keV
> unknown
> 1592.7keV
> unknown
>
> I search those peaks in the following website but there are too plenty
> possibilities
> http://nucleardata.nuclear.lu.se/Scripts/database/nudat/Gamma.idc
>
> Could anybody give me advice on this? Thank you
>
> John Lam, Physicist, Eastern Hospital, Hong Kong
>
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