A dilute aqueous chemical dosimeter (assumed to be similar to water) is enclosed in an equilibrium-thickness capsule of PMMA and exposed to "Co y rays in a water phantom. Calculate the approximate ratio of D let in this dosimeter to the dose under CPE conditions in water, Dw, assuming the weighting factor in Burlin's theory to be firstly @BG = 1 and secondly @BG = 0. Ignore any other parameter related to the detector cavity size, that is, take L / p ~ Sa/p