Figure 5. (a) Estimated scattered radiation as a function of distance from the wall in double and single wall scattering by multiple-distance measurement using the 0.6 cm3 chamber at position A inside the jig. (b) Deviation in measured relative ionization from the calculated value as a function of distance from wall for both the chambers (DW, double wall; SW, single wall). The measurement distances were 12 cm, 16 cm, and 18 cm. The calculated relative ionizations were determined from estimated scattered radiations using the 0.6 cm3 chamber.