Beta response of Ludlum model 9 survey meter to Kr85 and Pm147

["James Tracy" <james.tracy@nist.gov>]

Does anyone have any data on the response of a Ludlum model 9 ion chamber to
Kr85 and Pm147?  I'm looking for a beta correction factor to a point source
at distances of 4 cm and 30 cm.

I checked with the manufacturer and all they have is a correction factor for
a slab of uranium.
The RHH (Shleien 3rd ed table 9.11) has factors for various ion chambers,
but the the model 9 is not listed and the values vary widely for different
instruments.

Thanks.

Jim Tracy
email: james.tracy@nist.gov

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