title: Correction factors kE and kQ for LiF-TLDs for dosimetry in megavoltage electron and photon beams.
abstract: For the determination of absorbed dose to water D,using thermolumeniscence (TL) probes in a beam different from that used for calibration, correction factors for radiation type and radiation quality kE and kQ are needed. Values for kE and kQ for two different shapes of LiF probes (rods and disks) were obtained for high-energy photon and electron beams. The relation between the absorbed dose to the medium (water) D, measured by ion-chambers according to DIN 6800-2, 2008 and TL-probes having a (60)Co-calibration factor, leads for each shape and each batch of LiF probes to correction factors for radiation type and radiation quality kE and kQ.. The influence of the shape on the correction factor of the probes amounts in our experiment up to 2%. Therefore, it is recommended that the correction factors kE and kQ for rods and disks should be checked for each batch of LiF-detectors.
authors: Univ.-Klinikum Freiburg, Klinik f. Strahlenheilkunde, Medizinische Physik, Robert-Koch-Straße 3, 79106 Freiburg, Germany. Electronic address: gregor.bruggmoser@uniklinik-freiburg.de.
authors: Gregor
authors: G
authors: Bruggmoser
authors: Univ.-Klinikum Freiburg, Klinik f. Strahlenheilkunde, Medizinische Physik, Robert-Koch-Straße 3, 79106 Freiburg, Germany.
authors: Rainer
authors: R
authors: Saum
authors: Univ.-Klinikum Freiburg, Klinik f. Strahlenheilkunde, Medizinische Physik, Robert-Koch-Straße 3, 79106 Freiburg, Germany.
authors: Felicitas
authors: F
authors: Saum
authors: Univ.-Klinikum Freiburg, Klinik f. Strahlenheilkunde, Medizinische Physik, Robert-Koch-Straße 3, 79106 Freiburg, Germany.
authors: Mark
authors: M
authors: Gainey
authors: PTW FREIBURG, Lörracher Straße 7,79115 Freiburg, Germany.
authors: Christian
authors: C
authors: Pychlau
authors: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors: Ralf-Peter
authors: RP
authors: Kapsch
authors: Inst. für Medizinische Physik und Strahlenschutz (IMPS), Technische Hochschule Mittelhessen, Wiesenstraße 14, 35390 Gießen, Germany.
authors: Klemens
authors: K
authors: Zink
mesh_terms: D016477:Artifacts; D004583:Electrons; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005459:Fluorides / Q000528:radiation effects*; D018020:Lithium Compounds / Q000528:radiation effects*; D017785:Photons; D011882:Radiotherapy, High-Energy / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods
chemical_list: D018020:Lithium Compounds; C027651:lithium fluoride; D005459:Fluorides
keywords: Korrektionsfaktoren; LiF-Detektoren; LiF-detectors; Thermoluminescence-dosimetry; Thermolumineszenz-Dosimetrie; correction factors