Journal Article

A 3D In-Phantom Dosimetry System to Estimate the Effective Dose Equivalent

D.J.J. Wieczorek and C.C.K. Wang

in Radiation Protection Dosimetry

Volume 76, issue 3, pages 149-157
Published in print March 1998 | ISSN: 0144-8420
Published online March 1998 | e-ISSN: 1742-3406 | DOI: https://dx.doi.org/10.1093/oxfordjournals.rpd.a032259
A 3D In-Phantom Dosimetry System to Estimate the Effective Dose Equivalent

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A 3D in-phantom dosimetry system was designed and constructed to provide a means of accurately estimating the effective dose equivalent, HE, for neutron exposure in the workplace. A 40 cm x 40 cm x 15 cm polymethylmethacrylate (tradename Lucite) slab phantom was constructed and superheated liquid droplet detectors (SLDDs) were placed inside the phantom to represent various organ location in the slab phantom. An unmoderated and a D2O-moderated 252Cf source were used to test experimentally the accuracy of the 3D in-phantom dosimetry system in estimating HE. Results of the calculational and experimental estimates of HE based on the ICRP Publication 60 tissue weighting factors were found to agree to within ±35% for both unmoderated and D2O-moderated 252Cf sources incident in the AP, RL, LL, and PA geometries. These results indicate the viability of the SLDD-based in-phantom system in estimating HE from neutron exposure without extensive prior knowledge of the actual neutron fields.

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Subjects: Nuclear Chemistry, Photochemistry, and Radiation

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