Monochromatic wavelength dispersive x-ray fluorescence (MWD XRF) is an enhanced version of conventional wavelength-dispersive X-ray spectroscopy (WDXRF) elemental analysis. The key difference is that MWD XRF uses a doubly curved crystal X-ray optic between the X-ray source and the sample resulting in monochromatic excitation.[1][2] This additional optic creates a high-intensity X-ray beam on a small spot size without increasing the power of the X-ray source. An MWD XRF instrument is constructed from a low-power X-ray tube, a point-to-point focusing optic for excitation, a sample cell, a focusing optic that collects the fluorescence from the sample, and an X-ray detector. By using an optic between the X-ray source and the sample, a monochromatic beam free of bremsstrahlung, excites the sample, eliciting the secondary fluorescence X-rays needed for elemental analysis. By restricting the band of wavelengths used for excitation, a much higher signal to background ratio is achieved. This type of excitation allows much lower limits of detection and faster reading times.[3]
^G. Havrilla, et al., "Monochromatic Wavelength Dispersive X-Ray Fluorescence for Improved Pu Assay" 2013-12-30 at the Wayback Machine International Atomic Energy Agency Safeguards Symposium, November 2010 Vienna, Austria
^Z. W. Chen, et al., Journal of ASTM International September 2005 Volume 2 No. 8
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monochromatic, wavelength, dispersive, fluorescence, enhanced, version, conventional, wavelength, dispersive, spectroscopy, wdxrf, elemental, analysis, difference, that, uses, doubly, curved, crystal, optic, between, source, sample, resulting, monochromatic, e. Monochromatic wavelength dispersive x ray fluorescence MWD XRF is an enhanced version of conventional wavelength dispersive X ray spectroscopy WDXRF elemental analysis The key difference is that MWD XRF uses a doubly curved crystal X ray optic between the X ray source and the sample resulting in monochromatic excitation 1 2 This additional optic creates a high intensity X ray beam on a small spot size without increasing the power of the X ray source An MWD XRF instrument is constructed from a low power X ray tube a point to point focusing optic for excitation a sample cell a focusing optic that collects the fluorescence from the sample and an X ray detector By using an optic between the X ray source and the sample a monochromatic beam free of bremsstrahlung excites the sample eliciting the secondary fluorescence X rays needed for elemental analysis By restricting the band of wavelengths used for excitation a much higher signal to background ratio is achieved This type of excitation allows much lower limits of detection and faster reading times 3 Schematic of MWD XRFReferences edit Monochromatic wavelength dispersive x ray fluorescence G Havrilla et al Monochromatic Wavelength Dispersive X Ray Fluorescence for Improved Pu Assay Archived 2013 12 30 at the Wayback Machine International Atomic Energy Agency Safeguards Symposium November 2010 Vienna Austria Z W Chen et al Journal of ASTM International September 2005 Volume 2 No 8 nbsp This spectroscopy related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Monochromatic wavelength dispersive x ray fluorescence amp oldid 1160967125, wikipedia, wiki, book, books, library,
