[ RadSafe ] Ion Chamber Effective Center

[Robert D Holcomb]

Hi, does anyone have a quick reference on the calculation for detector effective center, relating to proper distances for calibration.  Our cal source is getting weaker, and it is becoming a potential accuracy issue. My specific application is the typical 3" diam. cylindrical ion chamber, oriented vertically.  

Thanks for your help.

R. DeWayne Holcomb
The Univ. of Texas at Austin
EH&S - Radiation Safety
(512) 471-2038  Office
        656-8760  Cell
        475-6383  FAX