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A portable XRF analyzer using a silicon drift detector. In energy-dispersive analysis, dispersion and detection are a single operation, as already mentioned above. Proportional counters or various types of solid-state detectors (PIN diode, Si(Li), Ge(Li), silicon drift detector SDD) are used.
Microscopy and analysis / European edition. p 10-13 (May, 2011). X-ray fluorescence as an additional analytical method for a scanning electron microscope. Procop, M., Hodoroaba, V. Microchim Acta Vol 161, p 413–419 (2008). Gaining improved chemical composition by exploitation of Compton-to-Rayleigh intensity ratio in XRF analysis.
Schematic of MWD XRF. 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.
Later NASA developments did lead to an X-ray spectrographic unit that did make the desired moon soil analysis. The Norelco efforts faded but the use of X-ray spectroscopy in units known as XRF instruments continued to grow. With a boost from NASA, units were finally reduced to handheld size and are seeing widespread use.
With traditional portable XRF analysers, alloy identification has been based on the analysis of the heavy elements because magnesium, aluminum and silicon produce low energy x-rays that are impeded by air. The portable vacuum pump ... evacuates the analysis path of air, making the measurement of these elements possible."
Malvern Panalytical is a Spectris plc company. [6] The company is a manufacturer and supplier of laboratory analytical instruments. [7] [8] It has been influential in the development of the Malvern Correlator, [9] and it remains notable for its work in the advancement of particle sizing technology. [10]
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