A5056525643- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced X-ray Imaging Techniques
- Advanced X-ray and CT Imaging
- Cultural Heritage Materials Analysis
- X-ray Diffraction in Crystallography
- Analytical chemistry methods development
- Radiation Shielding Materials Analysis
- Radioactivity and Radon Measurements
- Laser-Matter Interactions and Applications
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Bone health and osteoporosis research
- Laser-Plasma Interactions and Diagnostics
- Particle Detector Development and Performance
- Trace Elements in Health
- Crystallography and Radiation Phenomena
- Medical Imaging Techniques and Applications
- Orthopaedic implants and arthroplasty
- Geochemistry and Geologic Mapping
- Advancements in Photolithography Techniques
- Advanced MRI Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Air Quality and Health Impacts
TU Wien
2014-2024
McGill University
2019
University of Vienna
2001-2018
Universities Austria
1997-2016
Steklov Mathematical Institute
2010
General Electric (Austria)
1981-2009
University of Alberta
1997
Telstra (Australia)
1994
National University of Singapore
1988
International Atomic Energy Agency
1988
Coherent extreme-ultraviolet radiation extending to wavelengths below the carbon K edge at 4.37 nanometers (nm) has been generated a repetition rate of 1 kilohertz by focusing 5-femtosecond near-infrared (780 nm) laser pulses into helium gas jet. The incident light field performs just few oscillations, which results in emission an x-ray supercontinuum rather than discrete harmonics. Owing extremely short rise time driving pulses, neutral atoms can be exposed high fields before they are...
Helium atoms ionized by intense few-cycle light pulses in the barrier suppression regime emit spatially coherent extreme ultraviolet continuum extending to photon energies greater than ${E}_{\mathrm{ph}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.5\mathrm{keV}$ ( $\ensuremath{\lambda}<2.5\mathrm{nm}$). The high-energy end of range ${E}_{\mathrm{ph}}\ensuremath{\ge}0.2\mathrm{keV}$ $\ensuremath{\lambda}\ensuremath{\le}6\mathrm{nm}$) was characterized spectrally over a considerable...
Abstract Total reflection x‐ray fluorescence analysis (TXRF) is a special energy‐dispersive analytical technique extending XRF down to the ultra trace element range. Detection limits of picograms or nanograms per gram levels are reached with tube excitation. Using synchrotron radiation as excitation source, femtogram detectable, particularly important for Si wafer surface analysis. TXRF specially suited applications in which only very small amount sample available, few micrograms required In...
Trace elements are chemical in minute quantities, which known to accumulate the bone. Cortical and trabecular bones consist of bone structural units (BSUs) such as osteons packets different mineral content separated by cement lines. Previous studies investigating trace lacked resolution therefore very little is about local concentration zinc (Zn), strontium (Sr) lead (Pb) BSUs human We used synchrotron radiation induced micro X-ray fluorescence analysis (SR μ-XRF) combination with...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTotal-reflection x-ray fluorescence spectrometric determination of elements in nanogram amountsPeter. Wobrauschek and Hannes. AigingerCite this: Anal. Chem. 1975, 47, 6, 852–855Publication Date (Print):May 1, 1975Publication History Published online1 May 2002Published inissue 1 1975https://pubs.acs.org/doi/10.1021/ac60356a034https://doi.org/10.1021/ac60356a034research-articleACS PublicationsRequest reuse permissionsArticle...
We present a measurement of the low-energy (0–60 keV) γ-ray spectrum produced in α decay U233 using dedicated cryogenic magnetic microcalorimeter. The energy resolution ∼10 eV, together with exceptional gain linearity, allows us to determine low-lying isomeric state Th229 four complementary evaluation schemes. most precise scheme determines isomer be 8.10(17) corresponding 153.1(32) nm, superseding precision previous values based on γ spectroscopy, and agreeing recent internal conversion...
This annual review of X-ray fluorescence covers developments over the period 1999–2000 in instrumentation and detectors, matrix correction spectrum analysis software, optics microfluorescence, synchrotron XRF, TXRF, portable XRF on-line applications as assessed from published literature. The also includes a survey applications, covering sample preparation, geological, environmental, archaeological, forensic, biological, clinical, thin films, chemical state speciation studies. During current...
In the present contribution, a critical evaluation of use EDXRF (Energy dispersive X-ray fluorescence spectrometry) for elemental composition determination (K, Ca, Mn, Fe, Cu, Zn, Sr and Rb) coffee samples is presented. Firstly, several sample treatment procedures (pressed pellets loose powder) quantification strategies (fundamental parameters empirical calibration) were evaluated. addition to quality nutritional purposes, information content in can be also useful traceability provenance...
Abstract In humans the toxic trace element lead (Pb) mainly accumulates in skeletal tissue where it resides for a long period. Although Pb is known to play role bone and cartilage diseases, distribution of these tissues mostly unknown. Therefore synchrotron‐radiation‐induced micro x‐ray fluorescence analysis (SR µ‐XRF) various geometries was used determine distributions Pb, Ca, Zn Sr at cartilage‐bone interface human femoral heads patellae. SR µ‐XRF results were matched with backscattered...
This comprehensive review covers the latest published activities using XRF techniques. X-ray analytical equipment continues to be integrated with emission/diffraction/absorption techniques growing use of synchrotron radiation (SR) sources reflected in literature. integration trend was also prevalent development small-scale laboratory equipment. detectors have advanced pixellated systems, micro-calorimeter types and now established silicon drift being readily used by many authors. Matrix...
An existing micro-x-ray fluorescence (micro-XRF) spectrometer designed for light element analysis (6 ≤ Z 14) has been extended to confocal geometry: a second polycapillary x-ray optic introduced in front of the energy dispersive detector. New piezo positioners optimum alignment both optics have installed inside vacuum chamber. The offers now possibility true 3D elemental micrometer regime. Depth resolution varies between 100 μm at 1 keV (Na-Kα) and 30 17.5 (Mo). To further extend analytical...
This review comments on the ever expanding range of work using XRF group techniques published approximately between April 2012 and March 2013. It presents innovative as opposed to wealth contributions that combine spectrometry in conjunction with other analytical those descriptions valuable routine applications during period. New specialised laboratory instruments, X-ray sources data processing procedures have been introduced well further detector development. Portable hand-held systems...
This review offers the reader a wealth of information published between April 2010 and March 2011 concerning analytical endeavours using range conventional hyphenated XRF techniques that encourage user to ensure potential for high spectral sensitivity and, where appropriate, spatial resolution is achieved. The development advanced micro-beam set ups new X-ray optics driven by third generation synchrotron based provide nano-imaging detection nano-particles on single cells whilst TXRF coupled...
Abstract Gadolinium-based contrast agents (GBCAs) are frequently used in patients undergoing magnetic resonance imaging. In GBCAs gadolinium (Gd) is present a bound chelated form. Gadolinium rare-earth element, which normally not human body. Though the blood elimination half-life of about 90 minutes, recent studies demonstrated that some tissues retain gadolinium, might further pose health threat due to toxic effects free gadolinium. It known bone tissue can serve as depot, but so far only...
The use of synchrotron radiation (SR) as an excitation source for total reflection X-ray fluorescence analysis (TXRF) offers several advantages over tube excitation. Detection limits in the fg range can be achieved with efficient low Z well high elements due to features and particular brilliance a wide spectral linear polarization orbital plane. SR-TXRF is especially interesting samples where only small sample masses are available. Lowest detection typically using multilayer monochromators...