Photoluminescence dosimetry: The alternative in personnel monitoring

Abstract

A new full automatic PLD system, consisting of a one-element photoluminescent glass and the readout system Toshiba FGD-10, is now commercially available, PTB type tested and introduced into routine monitoring. Mainly because of its glass specific dosimetric properties, the PLD system was found to be superior to film dosemeters and TLD systems. Under the aspect of routineapplication, the paper discusses the dosimetry system using pulsed UV-laserexcitation and the dosimetric properties, such as energy and angular response, random uncertainty and ambient parameters affecting the dose measurement.The main advantages are the low pre-dose of (30±1) µSv of annealed glasses, the low coefficient of variation of 2% at 0.1 mSv which allows to measure dosesabove 10 µSv, the long-term stability of the dose measurement of about 1%, theoptimised energy and angular response for the simultaneous indication of differentdose quantities such as exposure X free in air or Hp(10) on a slab phantomin an energy range of 12 keV-1.3 MeV. In comparison with other dosimetry systemsthe results of the patten approval and the participation to an IAEA intercomparisonfor personnel dosimeters as well as the results of routine monitoringconfirm the progress in photolumenescence dosimetry and the precision of measurementalso under elevated ambient temperature within individual and environmentalmonitoring. © EDP Sciences, 1994.