Experimental verification of dosimetry predictions of bremsstrahlung attenuation as a function of material and electron energy

• Published in: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 40; no. 6; pp. 1409 - 1417
• Main Authors: Sanford, T.W.L., Halbleib, J.A., Beutler, D.E., Knott, D.P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-12-1993; Institute of Electrical and Electronics Engineers
• Subjects: A CODES; ALUMINIUM; Artificial intelligence; ATTENUATION; Attenuation measurement; BREMSSTRAHLUNG; COMPUTER CODES; DATA; DOSES; Dosimetry; ELECTROMAGNETIC RADIATION; Electron beams; Electron sources; ELEMENTS; Energy measurement; Exact sciences and technology; EXPERIMENTAL DATA; Experimental methods and instrumentation for elementary-particle and nuclear physics; INFORMATION; IRON; Laboratories; LEAD; Linear particle accelerator; METALS; Monte Carlo methods; NEUTRAL-PARTICLE TRANSPORT; Nuclear physics; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUMERICAL DATA; PHOTON TRANSPORT; Physics; Predictive models; Radiation detectors, dosimeters; RADIATION DOSES; RADIATION TRANSPORT; RADIATIONS; Solid-state detectors; TRANSITION ELEMENTS 663620 > Physics of Radiations Other Than Neutrons > (1992-); Thermoluminescent dosemeters; Attenuation; Electron beams; Dosimetry; Experimental study; Bremsstrahlung
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/23.273524

Dose attenuation with depth in an absorber of on-axis bremsstrahlung generated from an electron target is measured. It is shown to agree within +or-9% with Monte Carlo predictions as a function of absorber material (Al, Fe, Pb) and incident electron-beam energy (5.5-25.1 MeV). For this on-axis bremsstrahlung, 1 to 5 g/cm/sup 2/ of upstream and 0.2 to 1 g/cm/sup 2/ of downstream Al buffer are sufficient to provide electron equilibration for CaF/sub 2/:Mn thermoluminescent dosimeters (TLDs) over the measured energy range of 5.5 to 25.1 MeV. Once effective equilibration has been established, an expression is given that can be used to predict the dose-area product per absorbed beam charge at a given incident beam energy in TLDs as a function of depth in absorbers, within a fixed solid angle centered about the beam axis. This expression is quantified for the measurements presented here.< >