lexsygresearch

Thermoluminescence (TL) is a backbone in radiation protection dosimetry with a long tradition and used for a wide range of dosimetric purposes, including accident dosimetry, retrospective…

Photostimulated Luminescence (PSL or POSL) is also called Optically Simulated Luminescence (OSL) and can be used for a wide range of dosimetric purposes. It is gaining importance in radiation…

Luminescence emitted during exposure to ionizing radiation can be employed for online dosimetry, e.g. in brachytherapy.Al2O3:C or BeO attached to optical fibres for online dosimetry can serve…

Active dosimeters, like rem-mteters, superheated emulsions and electronic personal dosemeters can be used to measure neutron fields. But frequently passive dosemeters are used to determine…

Food stuff often is irradiated with ionizing radiation for sterilisation purposes. This requires the detection and estimates of the applied doses. The attached mineral dust or the food itself…

Ionizing radiation from a large variety of isotopic sources, as well as accelerators, electron beams, etc. are increasingly used in radiotherapy. Clinical diagnostics employing ionizing radiation…

Luminescence spectroscopy is used to investigate the luminescence properties of materials and thus allow more precise definitions e.g. of measurement parameters (e.g. detection ranges). It can…

Measuring luminescence with EMCCD camera allows for the spatial differentiation of luminescence signals. Different minerals, mineral phases, radiation hot spots etc. can be determined in granular…

Time resolved luminescence measurements allow the determination of the life-times of electron states and thus description of the kinetics involved. This allows the correlation to different…

Age range, Few years (depending on signal intensity and sensitivity of equipment for which the lexsyg systems are especially developed), Up to ~150-200,000 years (depending on dosimetry),…

Due to higher saturation doses the age range is larger than for OSL, Internal dose rates in K-feldspar reduce dependency on external dose rate and water content, Might suffer from an anomalous…

Not every grain in a sediment sample reflects the same last bleaching and burial history. By analysing single mineral entities (whether grains or parts of it) different dose populations can be…

Infrared-Radiofluorescence (IR-RF) is a technique for dosimetric dating of potassium feldspar to establish sedimentation ages. This method avoids some of the problems of other trapped-charge…

Sometimes mineral separation in sediment or solid samples is not possible (polymineral samples), especially in cases of intergrowth of minerals. Pulsing (i.e. short light stimulation) the…

Rocks containing amorphous/microcrystalline SiO2 can be dated by luminescence methods when they have been heated to approximately 400°C. Such temperatures, whether accidentally or deliberately,…

While the typology of ceramics is a backbone of many archaeological chronologies, establishing the age directly for certain types of ceramics is sometimes required. Optically Stimulated…

Granite or other quartz/feldspar containing rocks are preferentially dated with spatially resolved luminescence, Marble, limestone surfaces are dated with Optically Stimulated Luminescence (OSL)…

Optically Stimulated Luminescence (OSL, TT-OSL) dating of quartz grains from sediments, Infrared Stimulated Luminescence (IRSL, pIRIR, IR-RF) dating of feldspar grains from sediments, Trench…