Optically stimulated luminescence in retrospective dosimetry.
Since the beginning of the 1990s the exploration of optically stimulated luminescence (OSL) in retrospective accident dosimetry has driven an intensive investigation and development programme at Risø into measurement facilities and techniques. This paper reviews some of the outcomes of this programme, including the evaluation of the single-aliquot regenerative-dose (SAR) measurement protocol with brick quartz and the determination of dose-depth profiles in building materials as a guide to determining the mean energy of the incident radiation. Investigations into heated materials are most advanced, and a lower detection limit for quartz extracted from Chernobyl bricks was determined to be <10 mGy. The first results from the measurement of doses in unheated building materials such as mortar and concrete are also discussed. Both small-aliquot and single-grain techniques have been used to assess accident doses in these cement based building materials more commonly found in workplaces. Finally some results of a preliminary investigation of the OSL properties of household chemicals are discussed with reference to their potential as accident dosemeters.
Bøtter-Jensen
L
L
Risø National Laboratory, Roskilde, Denmark. lars.boetter@risoe.dk
Murray
A S
AS
D002588:Cesium Radioisotopes / Q000032:analysis*; D003037:Cobalt Radioisotopes / Q000032:analysis*; D003252:Construction Materials / Q000032:analysis; D003718:Denmark; D011847:Radioactive Fallout; D018788:Radioactive Hazard Release; D012189:Retrospective Studies; D013819:Thermoluminescent Dosimetry / Q000379:methods*; D014455:Ukraine
D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D011847:Radioactive Fallout