title: The energy response of agar-alanine phantom dosimeter to gamma radiation.
abstract: 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.
authors.affiliation: Brookhaven National Laboratory, Medical Department, Upton, New York 11973.
authors.forename: B
authors.initials: B
authors.lastname: Ciesielski
authors.forename: L
authors.initials: L
authors.lastname: Wielopolski
authors.forename: L E
authors.initials: LE
authors.lastname: Reinstein
mesh_terms: D000362:Agar; D000409:Alanine; D005720:Gamma Rays; D006801:Humans; D008433:Mathematics; D008953:Models, Anatomic; D009132:Muscles / Q000528:radiation effects; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage
chemical_list: D000362:Agar; D000409:Alanine