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Radiation Protection Dosimetry 28:73-76 (1989)
© 1989 Oxford University Press

Production and Use of a Polyethylene-Based Tissue-Equivalent Spherical Phantom Substituting the ICRU Sphere for Photons

K.-P. Hermann and D. Harder

A new plastic material RS-1, which simulates the radiological properties of the ICRU sphere material for photons, has been produced by melting polyethylene together with additive amounts of MgO and CaCO3. In a spherical phantom of 30 cm diameter made from RS-1 measurements of H'(0.07) and H'(10) with 60Co gamma radiation were performed for various angles of photon incidence and compared with the corresponding values measured in a slab phantom of the same material. The results give evidence for the usefulness of slab phantoms as an aid in personal dosemeter calibrations. The good estimate of Hp(10) obtainable from measurements with personal dosemeters (TLD rods) being calibrated in terms of H'(10) was also experimentally illustrated.


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