title: Influence of the stem effect on radioluminescence signals from optical fibre Al2O3:C dosemeters.
abstract: This paper analyses the influence of the Cerenkov radiation and other noise sources, the so-called stem effect, on radioluminescence (RL) signals generated in optical fibre Al2O3:C dosemeters used in medical dosimetry. The optical fibre dosemeter consists of a sensitive Al2O3:C crystal coupled to an optical fibre cable that carries the RL and optically stimulated luminescence (OSL) signals generated in the Al2O3:C crystal. During irradiation of the dosemeter, the real-time dose rate can be determined from the RL signal and after irradiation the total dose absorbed is determined from the OSL signal stimulated using a focused green solid-state laser. In particular, the components of the stem effect generated in the fibres were analysed to determine their impact on the RL signal.
authors.affiliation: Radiation Research Department, Risø National Laboratory, DK-4000 Roskilde, Denmark.
authors.forename: Carl Johan
authors.initials: CJ
authors.lastname: Marckmann
authors.forename: Marianne C
authors.initials: MC
authors.lastname: Aznar
authors.forename: Claus E
authors.initials: CE
authors.lastname: Andersen
authors.forename: Lars
authors.initials: L
authors.lastname: Bøtter-Jensen
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry* / Q000528:radiation effects*; D016477:Artifacts; D003198:Computer Simulation; D004307:Dose-Response Relationship, Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008956:Models, Chemical; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods
chemical_list: D000537:Aluminum Oxide