Clarification: Efficiency for detection of Tc-99m

["Jacobus, John (OD)" <JJacobus@exchange.nih.gov>]

Please note that Tc-99m is used in nuclear medicine studies for in vivo imaging.
It emits photons and conversion electrons.

Can anyone give me a reasonable detection efficiency for measuring Tc-99m
surface contamination using a GM pancake type probe?

-- John

John Jacobus, MS
Health Physicist
National Institutes of Health
Radiation Safety Branch, Building 21
21 Wilson Drive, MSC 6780
Bethesda, MD  20892-6780
Phone: 301-496-5774      Fax: 301-496-3544
jjacobus@exchange.nih.gov (W)
jenday@ix.netcom.com (H)
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