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  • Title: Characteristics of a tandem system of ionization chambers in X-ray beams, mammography level.
    Author: Afonso LC, Vivolo V, Caldas LV.
    Journal: Appl Radiat Isot; 2010; 68(4-5):610-3. PubMed ID: 19910201.
    Abstract:
    Two parallel plate ionization chambers (inserted in slab phantoms) recently assembled at IPEN were studied in relation to their operational characteristics for use in quality control of X-ray beams, mammography level. The chambers present only one difference: one has an inner collecting electrode made of graphite and the other, of aluminum. These chambers make up a tandem system, which may be employed to verify X-ray beams energy constancy, by the confirmation of half-value layers and effective energies, and to determinate air kerma rates. The chambers presented good results for the operational tests, as recommended internationally.
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