Search

Infrared stimulated Luminescence dating Many types of sediment do not contain quartz and for dating the light exposure to light of such sediments Infrared stimulated Luminescence (IRSL) is used. 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 signal loss which leads to age underestimation Post-Infrared Infrared luminescence (p-IRIR) allows the dating of Middle Pleistocene sediments Preusser, F., Muru, M., and Rosentau, A. (2014). Comparing different post-IR IRSL approaches for the dating of Holocene coastal foredunes from Ruhnu Island, Estonia. Geochronometria 41, 342-351. Zöller, L., Richter, D., Masuth, S., Wunner, L., Fischer, M., and Antl-Weiser, W. (2013). Luminescence chronology of the Grub-Kranawetberg site, Austria. Eiszeitalter & Gegenwart / Quaternary Science Journal 62, 127–135. IRSL-signals of a single aliquot from a SAR protocol applied to polymineral loess Related Solutions and Industries: Luminescence Dating and Dosimetry Matching Products TL/OSL series lexsygsmart The most sensitive TL/OSL reader Learn more TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Optically stimulated Luminescence dating of quartz Exposure to light reduces the Optically stimulated Luminescence (OSL) signal from quartz and provides the basis for dating the event of light exposure and thus the sedimentation. 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) Sediment types Aeolian sediments like dunes or loess are suited very well Lacustrine and fluvial deposits can be dated Glaciogenic sediments are difficult Used for Geomorphological reconstruction Palaeoenvironmental reconstruction Earth quake history River system reconstruction Chronostratigraphy Stimulation wavelengths for quartz Blue Green UV Murray AS & Wintle AG (2000) Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol. Radiation Measurements 32, 57-73. Principle of the single aliquot regeneration (SAR after Murray & Wintle, 2000) method to determine the palaeodose, where the natural luminescence signal is interpolated on the regenerated signal obtained by irradiation of the same aliquot Related Solutions and Industries: Luminescence Dating and Dosimetry Matching Products TL/OSL series lexsygsmart The most sensitive TL/OSL reader Learn more TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Electron Spin Resonance A standard for many dosimetric application. Electron Spin Resonance (ESR/EPR) is an important tool for fundamental studies in many fields. Radicals are studied with ESR in life sciences, environmental chemistry, research in food safety/quality, the petrochemistry, bioinorganic chemistry and many more, together with studies on metal compounds, antioxides, etc. ESR is the standard for many dosimetric application in e.g. electron beam and neutron dosimetry of alanine tablets to determine irradiation doses. Solid state physics applications include the investigation of paramagnetic centers and their orientation within a crystal. Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Time resolved luminescence To investigate charge carrier dynamics, e.g. lifetimes 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 centres and discrimination of processes. Employing excitation pulses of appropriate time length with adequate off-times for luminescence detection allows the separation of different luminescence signals, which might be related to different minerals (e.g. feldspar and quartz) and can be used for determining two different doses for a single sample (e.g. pulsed OSL for dating purposes). Frequency-domain life time measurements at nanosecond resolution Time-domain life time measurements at microsecond resolution Time-resolved ratiometric measurements Investigate quenching Chithambo ML (2007) The analysis of time-resolved optically stimulated luminescence: I. Theoretical considerations. Journal of Physics D: Applied Physics 40, 1874-1879. Chithambo ML (2007) The analysis of time-resolved optically stimulated luminescence: II. Computer simulations and experimental results. Journal of Physics D: Applied Physics 40, 1880-1889. Collier BB & McShane MJ (2013) Time-resolved measurements of luminescence. Journal of Luminescence 144, 180-190. Pagonis V, Chithambo ML, Chen R, Chruścińska A, Fasoli M, Li SH, Martini M & Ramseyer K (2014) Thermal dependence of luminescence lifetimes and radioluminescence in quartz. Journal of Luminescence 145, 38-48. Principle of pulsed excitation and emission of a dual fluorescence and phosphorescence measurement (from Collier & McShane, 2013) Matching Products TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Spatially resolved luminescence Spatial differentiation of luminescence signals for mineral specific analysis and hot spot identification 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 or solid samples and provide information on small scale differences of the radiation fields, or the material inhomogeneities (e.g. semiconductors). Greilich, S., Glasmacher U.A., Wagner G.A., 2005. Optical dating of granitic stone surfaces. Archaeometry 47, 645-665 Spatially resolved luminescence from a rock surface; A shows an optical microscopy image; B, the spatial distribution of the equivalent doses; C, the natural OSL signal; D, the regenerated OSL signal (from Greilich et al., 2005) Matching Products TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Luminescence spectroscopy To investigate the luminescence properties of materials. 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 help to better define the involved traps and centres, and contributes to the understanding of luminescence processes. Discher M & Woda C (2014) Thermoluminescence emission spectrometry of glass display in mobile phones and resulting evaluation of the dosimetric properties of a specific type of display glass. Radiation Measurements 71, 480-484. Tan K, Liu Z, Zeng S, Liu Y, Xie Y & Rieser U (2009) Three-dimensional thermoluminescence spectra of different origin quartz from Altay Orogenic belt, Xinjiang, China. Radiation Measurements 44, 529-533. TL-spectra from mobile phone glasses measured with a lexsyg research spectrometer equipped with an Andor Technology iDus 420 Series CCD camera (from Discher & Woda, 2014). Matching Products TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Medical dosimetry Radiotherapy, diagnostic radiology, nuclear medicine Medical dosimetry 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 (mainly X-ray) is expanding. Such uses require monitoring of exposures as well as determination of the delivered doses which can be achieved by luminescence dosimetry. Thermoluminescence (TL) dosimetry Photostimulated Luminescence (PSL or POSL) or Optically Simulated Luminescence (OSL) AlO, BeO, LiF, CaF, CaSO, … Life/real-time monitoring by radiofluorescence (e.g. Al 2 O 3 :C, BeO) Simultaneous life and accumulated dose measurement (OSL) Spatial measurement of dose distribution with OSL Nascimento LF, Vanhavere F, Boogers E, Vandecasteele J & De Deene Y (2014) Medical dosimetry using a RL/OSL prototype. Radiation Measurements 71, 359-363. Depth dose distribution for 6 MeV measured with radiofluorescence of Al2O3:C (from Nascimento et al., 2014) Matching Products TL/OSL series lexsygsmart The most sensitive TL/OSL reader Learn more TL/OSL series TLDcube A modern TLD reader by Freiberg Instruments Learn more TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Food Irradiation Control using TL and PSL/OSL techniques European standards DIN EN 13751 | DIN EN 1788 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 serves as dosimeter. TL/OSL to detect irradiation of e.g. spices Presence/absence of signal specific features shows the irradiation Dose estimates are possible for some materials Jo, Y., Sanyal, B., Chung, N., Lee, H.-G., Park, Y., Park, H.-J., and Kwon, J.-H. (2015). Calibrated photostimulated luminescence is an effective approach to identify irradiated orange during storage. Radiation Physics and Chemistry 111, 81-86. Photo Stimulated Luminescence (PSL) Learn more about our product PSLfood Silicate minerals contained in food according EN 13751 Spices (dust attached to spices) Shrimps (intestines contain dust/sand) Shells (crushed) Thermoluminescence (TL) Learn more about our TL/OSL reader: lexsyg research and lexsyg smart Silicate minerals extracted from food according to EN 1788 Spices (dust attached to spices) Herbs (dust attached to herbs) Seafood Xray Dose For a detection of food irradiation with luminescence methods (EN1788, EN13751) the food has to be irradiated in the laboratory for comparison. The large doses required are achieved with the Xray Dose irradiator. Matching Products TL/OSL series PSLfood For checking irradiated food according to EN 13751:2009 standard Learn more TL/OSL series lexsygsmart The most sensitive TL/OSL reader Learn more TL/OSL series TLDcube A modern TLD reader by Freiberg Instruments Learn more TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Neutron dosimetry Accelerators, space dosimetry, high-LET 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 equivalent doses in neutron fields from particle accelerators for quantitative and qualitative measurement. Especially Thermoluminescence (T) with LiF-dosemeters and recently Photo Stimulated Luminescence (PSL) with AlO- and LiB-dosemeters (see TL, OSL, PSL, Clinical dosimetry) are studied for radiation protection purposes and the determination of neutron irradiation doses. Agosteo, S. (2010). Overview of novel techniques for radiation protection and dosimetry. Radiation Measurements 45, 1171-1177. Kulkarni, M. S., Luszik-Bhadra, M., Muthe, K. P., Behrens, R., Rawat, N. S., Soni, A., Mishra, D. R., Gadkari, S. C., Gupta, S. K., and Sharma, D. N. (2014). New OSL detector combination for albedo neutron dosimetry. Radiation Measurements 71, 505-508. Response of passive detectors (Hp(10)) to various neutron energies (from Kulkarni et al., 2014) Matching Products TL/OSL series TLDcube A modern TLD reader by Freiberg Instruments Learn more TL/OSL series lexsygresearch The most advanced TL/OSL reader Learn more TL/OSL series lexsygsmart The most sensitive TL/OSL reader Learn more Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com

Electron Spin Resonance Used in electron beam and neutron dosimetry and many kinds of photon radiation dosimetry. Electron Spin Resonance (ESR) The material alanine is considered as tissue equivalent and widely used in dosimetry with Electron Spin Resonance (ESR or EPR) . It is especially used in electron beam and neutron dosimetry but also for many kinds of photon radiation dosimetry. Anton, M., Kapsch, R. P., Krauss, A., von Voigts-Rhetz, P., Zink, K., and McEwen, M. (2013). Difference in the relative response of the alanine dosimeter to megavoltage x-ray and electron beams. Physics in Medicine and Biology 58, 3259. Marchioni, E., Pabst, J. Y., and Kuntz, F. (2002). Characterization and application of two kinds of ESR dosimeters. Radiation Physics and Chemistry 65, 187-191. Signal comparison of alanine (2 Gy) ESR measurements with MagnetTech MS-200, MS-400 and MS-500 ESR-spectrometers (courtesy Kuntz, Arahouni, Werner – Aérial) Get in touch Do not hesitate to contact us – we are available to assist you with any inquiries or requests. Use our inquiry tool or reach out via email: sales @ freiberginstruments.com