Operational Technical Question

[Tad Blanchard <Tad.M.Blanchard.1@gsfc.nasa.gov>]

RADSAFERs,

What type of correction factor should be applied (if any) when using
an ionization chamber who's volume is greater than the incident beam?

(Drawing shown below)


Ionization Chamber Detector dimensions (3 1/2" dia X 4" long)
               VVVVV
              -------
              |     |
 _____________|_____|________
 _____________|_____|________ <---Xray Beam (1/2" diameter)
              |     |
            --       --
            |         |
            |         |
            |         |
            |         |
            -----------


************************** /^\   /^\ ***********************************
Tad  Blanchard            /__ \ /___\   NASA-Goddard Space Flight Center
Nat'l Health Svc, Inc          O         Code 205.9, Greenbelt, MD 20771
Sr Health Physics Tech        / \                    Phone: 301-286-9157
Assistant RSO                /___\                   Fax:   301-286-1618
                 mailto:Tad.M.Blanchard.1@GSFC.NASA.gov
        http://panza.gsfc.nasa.gov/205/205-2/Health/RADPROT.HTM

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