Build-up Caps for Survey Meters

[Ccja@aol.com]

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