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Neutron dosimetry

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

Application

Electron Spin Resonance (ESR)

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

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Filter wheel

Skip breadcrumb navigation Breadcrumb Freiberg Instruments Products Luminescence Dating and Dosimetry lexsygsmart Configuration options Filter wheel Filter wheel including suitable filters Interested? Get in touch! Contact now Filter wheel including suitable filters, which are optimized for maximized luminescence light collection and maximum suppression of scattered light (OSL, PL) and thermal noise (TL), recommended as minimum configuration to perform optimized TL/OSL/RF analyses in dating and other applications. Optics designed for high-efficiency light collection for PMT luminescence measurements Programmable change of detection window (duration of filter change between 300 ms and maximum 3s) during measurement Filter choice is software restricted according the chosen stimulationwavelength, thus malfunction (over exposure) is prevented Malfunctions are software protected, including PMT damage protection during measurement Optimized filter-sets for all main quartz or feldspar mineral luminescence emissions and for other materials/applications are available Filter sets (interference, color-glass optical filters) optimized for largest transmission of individual wavelength bands and best blocking of stimulation light (OSL) and/or thermal noise (TL, blackbody radiation) A filter wheel has 6 position and each position up to 6.5 mm of stacked filter thickness. 15 measurement functions are included (more information are available on request)

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Optional accessories

Optional accessories for lexsyg smart Additional sample carousel Each lexsyg smart TL/OSL reader is delivered with two exchangeable sample carousels with 50 samples positions (automatic changer) for ∅=10 + 0,0/-0,2 mm (max. thickness 1 mm sample discs). … Learn more Sample cups/discs Sample cups/discs are designed to provide excellent thermal conductivity. They are cleaned and vacuum sealed (20 pcs per/package) separately. Stainless steel, VA 1.4301, most popular, for… Learn more Aliquot preparation kit Our brand new Aliquot preparation kit includes a stamp and a template for quick silicon stamping on hundreds of sample cups or discs. Learn more LED head lamp 660 nm ± 15 nm, Two intensities, No side bands, Learn more Air compressor Maximum pressure: 8 bars, Low noise (33 dB), Weight (22 kg), 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

Application

Radioluminescence

Radioluminescence Online dosimetry, in vivo dosimetry Luminescence emitted during exposure to ionizing radiation can be employed for online dosimetry, e.g. in brachytherapy. Al 2 O 3 :C or BeO attached to optical fibres for online dosimetry can serve simultaneously as passive dosimeter Andersen CE, Edmund JM & Damkjær SMS (2010) Precision of RL/OSL medical dosimetry with fiber-coupled Al 2 O 3 :C: Influence of readout delay and temperature variations. Radiation Measurements 45, 653-657. Radioluminescence (time 0–100s), phosphorescence (100–500s), and the two-step CW-OSL (500–1200s) for 0.5 Gy irradiation (from Andersen et al., 2010) 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

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Pulsed OSL (10 µs)

Skip breadcrumb navigation Breadcrumb Freiberg Instruments Products Luminescence Dating and Dosimetry lexsygsmart Configuration options Pulsed OSL (10 µs) Pulsed OSL (10 µs) Maximum power, homogeneity and stability provided by the interchangeable OSL unit Interested? Get in touch! Contact now All lexsyg smart and lexsygresearch TL/OSL readers can be equipped with an interchangeable OSL unit containing up to three stimulation wavelengths. These are provided by high power stimulation LEDs or laser diodes. The integration of photo diodes provides the feedback for power control of each individual element, guaranteeing a stable stimulation source, independent of element aging. LED/laser diodes stimulation Available stimulation wavelengths: (LED/laser diodes) UV (365 nm), Violet (405 nm), Blue (458 nm), Green (525 nm), Yellow (590 nm), IR (850 nm), Red (620 nm) Modes of operation for OSL Continuous Wave OSL (CW-OSL) Linear Modulated OSL (LM-OSL) Pulsed OSL (POSL) Select up to three wavelengths per OSL unit: LED stimulations: Module# L0403 – Blue LED stimulation 458 ± 5 nm (max. 100 mW/cm² at sample position) Module# L0404 – IR LED stimulation 850 ± 20 nm (max. 300 mW/cm² at sample position) Module# L0405 – Green LED stimulation 525 ± 20 nm (max. 80 mW/cm² at sample position) Module# L0410 – VioletLED stimulation 405 ± 3 nm (max. 100 mW/cm² at sample position) Module# L0411 – UV LED stimulation 365 ± 3 nm (max. 100 mW/cm² at sample position); for bleaching Module# L0419 – Red LED stimulation (~620 nm) Laser diode stimulation: Rise/fall time: < 10 ns ON-Time: 50 ns to continuous wave Module# L0407 – Blue laser diode stimulation 445 ± 3 nm (max. 100 mW/cm² at sample position) Module# L0408 – IR laser diode stimulation 850 ± 3 nm (max. 300 mW/cm² at sample position) Module# L0409 – Violet laser diode stimulation 405 ± 3 nm (max. 100 mW/cm² at sample position) Module# L50064 – Green laser diode stimulation 523 ± 8 nm (max. 50 mW/cm² at sample position) Module# L50065 – Red laser diode stimulation 638 ± 5 nm (max. 75 mW/cm² at sample positio

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Irradiation sources

Skip breadcrumb navigation Breadcrumb Freiberg Instruments Products Luminescence Dating and Dosimetry lexsygsmart Configuration options Irradiation sources Irradiation sources for irradiations from room temperature up to 500 °C Interested? Get in touch! Contact now The lexsyg TL/OSL reader can be equipped with up to 2 irradiation units. A sensor controlled mechanical shutter moved by air pressure provides repeatable, easy and safe functionality. Beta source radioisotope: Sr-90; activity: 1.85 GBq; dose rate: about 0.11 Gy/s dose rate variation over the irradiation area: ≤ (± 10 %) @ 8 mm diameter, ≤ (± 12.5 %) @ 10 m diameter maximum energy: ca. 2.2 MeV Beta irradiation unit Beta source (ring) radioisotope: Sr-90; activity: < 3 GBq; dose rate: about 0.06 Gy/s very homogeneous dose rate over the irradiation area: (± 2.5 %) @ 8 mm diameter; (± 3.5 %) @ 10 mm diameter maximum energy: ca. 2.2 MeV required for Radio Fluorescence (RF) measurements/applications Alpha source Alpha irradiation unit radioisotope: Am-241, activity: 20- 30 MBq cover layer: ~3 μm Au active diameter: 21.0 mm (thickness 0.25mm) alpha type of radiation maximum Energy: 5.5 MeV very homogeneous dose rate over irradiation area Alpha irradiation unit X-ray generator X-ray generator - an alternative to beta/alpha source variable dose rate in contrast to beta/alpha source fully housed X-ray tube for highly homogeneous irradiation fully integrated dose rate live-time monitoring system zero radiation (when not in use) Technical details target material: Tungsten tube current: 0.1 - 1.0 mA maxmimum voltage: 50 kV shutter: 5 mm brass absorber: Al, 200 µm (changeable) varian VF-50J (fully housed)

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Radiation protection dosimetry

Radiation protection dosimetry TL, OSL, Radioluminescence, Electron Spin Resonance (ESR), Neutron dosimetry, Food irradiation and clinical dosimetry Precision in Radiation Protection and Dosimetry Freiberg Instruments offers a comprehensive range of dosimetry solutions designed to meet the diverse demands of radiation protection across multiple fields. Our technologies support real-time radioluminescence monitoring in applications like brachytherapy, precise control of food irradiation using Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) techniques, and compliance with standards such as DIN EN 13751 and DIN EN 1788. In the medical field, our dosimetry solutions are essential for monitoring radiation exposure to ensure patient and staff safety during radiotherapy. Additionally, our instruments are optimized for neutron dosimetry and traditional TL applications, offering robust, adaptable tools to professionals dedicated to maintaining safety in radiation-exposed environments. Thermoluminescence (TL) Learn more Photo/ Optically Stimulated Luminescence (PSL + OSL) Learn more Radioluminescence Learn more Electron Spin Resonance (ESR) Learn more Neutron dosimetry Learn more Food Irradiation Control Learn more Medical dosimetry Learn more

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Applications

Lexsyg Applications Radiation protection dosimetry TL, OSL, Radioluminescence, Electron Spin Resonance (ESR), Neutron dosimetry, Food irradiation and clinical dosimetry Thermoluminescence (TL) Learn more Photo/ Optically Stimulated Luminescence (PSL + OSL) Learn more Radioluminescence Learn more Electron Spin Resonance (ESR) Learn more Neutron dosimetry Learn more Food Irradiation Control Learn more Medical dosimetry Learn more Solid state dosimetry Luminescence spectroscopy, Time resolved luminescence, Spatially resolved luminescence and Electron Spin Resonance (ESR) Luminescence spectroscopy Learn more Spatially resolved luminescence Learn more Time resolved luminescence Learn more Electron Spin Resonance (ESR) Learn more Geology OSL, IRSL, Single grain/spatially resolved luminescence, Radiofluorescence, Electron Spin Resonance (ESR) and Pulsing Optically stimulated Luminescence dating of quartz (OSL) Learn more Infrared stimulated Luminescence dating of feldspar (IRSL) Learn more Single grain/spatially resolved luminescence dating Learn more Radiofluorescence Learn more Electron Spin Resonance (ESR) dating of quartz Learn more Pulsing: mixed mineral samples Learn more Archaeology Luminescence methods provide the age of archaeological sites or objects Flint and other heated rocks Learn more Ceramics, pottery, bricks and statues Learn more Unheated rock surfaces Learn more Tooth enamel and quartz grains Learn more Sediment dating Learn more

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Thermal stimulation (TL)

Skip breadcrumb navigation Breadcrumb Freiberg Instruments Products Luminescence Dating and Dosimetry lexsygsmart Configuration options Thermal stimulation (TL) Thermal stimulation Thermal stimulation up to 710 °C, allowing user-defined heating and cooling cycles for TL, preheating and elevated temperature OSL Interested? Get in touch! Contact now Ceramic heating element allows highly reliable and more consistent measurements. The heating element is cooled by continuous flow of nitrogen or compressed air. Thermoluminescence (TL), preheat (PH) including elevated temperature luminescence measurements (OSL, RL, etc.) as well as elevated temperature irradiation (at ionizing irradiation and “solar-light” position) are possible during any part of a heating/cooling cycle, which is almost freely programmable including non-linear heating/cooling functions. Heating rate: 0.1 - 20.0 C/s (@Tmax= up to 710 °C) Highly flexible step-wise programming of heating / cooling cycles within system parameters (i.e. temperature and heating/cooling rates) Software options for further temperature control (e.g. non-linear functions)