A small air-filled ionization chamber of fixed interior
dimensions is located 10 m from a 1 MeV gamma-ray
source. Imagine that the walls of the chamber are made of
aluminum and are of variable thickness. Neglecting background radiation, plot the relative ionization current from
the chamber as a function of wall thickness for the two
conditions listed below:
(a) The experiment is performed in a normal air-filled
laboratory.
(b) The experiment is performed in an earth satellite
and the surrounding space is essentially a vacuum.