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What calibration sources do you use for dose rate instuments?

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radgal:
What are the sources used out there to calibrate Beta/Gamma dose rate instuments?

Also what do you use for daily reponse checks, source and strength?

There are just to satisfy my curiosity what different places use.

Thanks

jjordan:
We use the Shepard to calibrate with, and we also source check the Tele's and AMP 100-200's with it. For the RO's  we use a Sr 90  2.0 e +4 uCi source with differnt shields to source check on all scales. I don't know if you got to see it or used it when you were here at Brunswick.
JJ

makua13:
C137 and Tc99 are the standards used by most (power) plants, but depending on what you are looking for the source may change.

SloGlo:

--- Quote from: Rad Gal on Jun 22, 2005, 11:39 ---What are the sources used out there to calibrate Beta/Gamma dose rate instuments?

Also what do you use for daily reponse checks, source and strength?

There are just to satisfy my curiosity what different places use.

Thanks

--- End quote ---
i've used cs137, tc99 most often, usually due to it's long life yielding less frequent t1/2 calcs.  on rare sites, i've used co60.
most are small content, 0.05 mci or so.  some have been bigger.  most are ~1" dia, but there have been rare times when bigger (~2") where on the site.

radgal:
SloGlo, Makua13 and JJordon

Thanks for the replies.  This is what I thought you guys used.  I just looking for confirmation 

JJordon:  Do you have a Beta correction factor for your RO20 due to your calabration source being a really strong Beta emitter.  (According to Eberline the RO20 is 93% efficienct for SR90 but only 30% efficient for Uranium Slab detection.)  I believe I know the answer but since I worked there before but I would just like it for the record, so to speak.

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