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The energy response of agar‐alanine phantom dosimeter to gamma radiation
Author(s) -
Ciesielski B.,
Wielopolski L.,
Reinstein L. E.
Publication year - 1988
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596235
Subject(s) - dosimeter , imaging phantom , radiation , dosimetry , electron paramagnetic resonance , photon , nuclear magnetic resonance , gamma ray , materials science , photon energy , physics , optics , nuclear medicine , nuclear physics , medicine
Calculations of the energy response of an electron paramagnetic resonance (EPR) signal induced by gamma radiation in an agar‐alanine phantom dosimeter are presented. Theoretically calculated slopes of the EPR signal calibration lines are comparable with those obtained experimentally for low‐(50 kVp), medium‐(662 keV), and high‐(15 MVp) energy photons. The sensitivity of the phantom dosimeter (EPR signal amplitude/Gray) varies less than 2% within the 150‐ to 20‐MeV energy range. For energies above 150 keV, the influence of variations in the size of alanine crystals is negligible.