Re: Build-up Caps for Survey Meters

[photcoef <photcoef@tiac.net>]

The response curves of ionization chambers, with and without buildup-caps,
can be calculated with PHOTCOEF.

For more information, visit http://www.photcoef.com

Paul Kehler


At 11:26 AM 1/3/97 -0600, you wrote:
>Caveat emptor. Most manufacturers, whose literature I've seen, recommend the
>use of the (removable) build-up caps on their ion-chambered meters, where the
>E's of interest are greater than 200-300 keV (the manufacturer of one widely
>used meter suggests: " Use the equilibrium cap if the effective energy of the
>source is over 100 keV."). Note that the response curve of an instrument can
>be strongly dependent on the cap.
>
>Chris Alston
>ccja@aol.com
>
>