A method to modify the lineal energy-based quality factor for semiconductor microdosiemeters. (August 2018)

• Record Type: Journal Article
• Authors: Payervand, Firouz; Raisali, Gholamreza; Moslehi, Amir
• Is Part Of: Radiation measurements. Volume 115(2018:Aug.)
• Page Start: 7
• Page End: 12
• Publication Date: 2018-08
• Subjects: Semiconductor microdosiemetry -- Quality factor -- Dose equivalent -- Monte Carlo simulation -- Geant4 toolkit; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2018.05.006
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: A lineal energy-based quality factor, Q ( y ), has been provided for a spherical sensitive volume (SV) of 1 μm diameter. Significant errors may occur in determination of the dose equivalent by application of this quality factor to larger SVs as is common for semiconductor microdosiemeters. In this work a method is provided to correct Q ( y ) obtained with large SVs. The dose equivalent determined with spherical tissue SVs with different diameters up to 150 μm for mono-energetic protons and alpha particles with energies from 1 to 10 5 MeV per nucleon and 1–10 4 MeV per nucleon, respectively, is calculated with the corrected quality factor as well as the uncorrected quality factor by means of a Monte Carlo method. The results obtained reveal that by use of the corrected quality factor, the difference between the dose equivalents calculated for SVs with diameters larger than 1 μm reduces from a factor of 3 to less than 30% for the worst case.