Dear fellow researchers,
does anyone have an idea about activity of typical standards for Th (ThO2 - Thorium oxide) and U (UO2 - uranite) used for EPMA/WDS?
What are your experience? Is it above 10000 Bq?
Aleš
See refference:
https://www.ptb.de/cms/fileadmin/internet/fachabteilungen/abteilung_6/6.1/6.13/katalog_en.pdf
A gram of ThO2 has an activity of 3578 Bq
A gram of UO2 has an activity of 23157 Bq
Determine the mass of the standard to determine the Bq. It is unlikely you will exceed 10000 Bq in either.
Which standards are you using? In my experience (which has been with HPGe Detectors not EPMA) the standards used come with a preparation and certification packet that explains the specifications of the standard in detail.
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