Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8210143 | Applied Radiation and Isotopes | 2014 | 8 Pages |
Abstract
Using anthropomorphic phantom in Geant4, determination of β- and γ-absorbed fractions and energy absorbed per event due to 131I activity in thyroid of individuals of various age groups and geometrical models, have been carried out. In the case of 131I β-particles, the values of the absorbed fraction increased from 0.88 to 0.97 with fetus age. The maximum difference in absorbed energy per decay for soft tissue and water is 7.2% for γ-rays and 0.4% for β-particles. The new mathematical MIRD embedded in Geant4 (MEG) and two-lobe ellipsoidal models developed in this work have 4.3% and 2.9% lower value of S-factor as compared with the ORNL data.
Related Topics
Physical Sciences and Engineering
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Radiation
Authors
Ziaur Rahman, Syed Bilal Ahmad, Sikander M. Mirza, Waheed Arshed, Nasir M. Mirza, Waheed Ahmed,