An ionometric method has been used for the determination of absorbed dose to water for 60Co gamma rays. Reliable estimation of the perturbation correction, which accounts for the presence of the chamber inside the water phantom, allows an accurate determination of this quantity. Details of the experimental work are given together with the theoretical background necessary for evaluation of the perturbation correction. The results are discussed by comparing them with those obtained by other methods.
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Boutillon et al. (1993) studied this question.
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