Titlebook: Worked Examples in X-Ray Analysis; R. Jenkins,J. L. Vries Book 1970 Springer Science+Business Media New York 1970 X-ray.spectrometry

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SMART

Continuous radiation — Scattered radiationThe continuous radiation from an X-ray tube is scattered by the sample, diffracted by the analyzing crystal and measured by the detector.

carotenoids

Detector resolutionThe resolution . of a proportional counter is expressed in terms of the peak width at half height multiplied by 100, and divided by the value of the maximum pulse amplitude.

Arboreal

断言

就职

Pulse height selection — crystal fluorescenceIt is necessary to set up an X-ray spectrometer for the measurement of sodium in a series of rock specimens. An argon/methane flow counter is being employed and a KAP (potassium hydrogen phthalate) analysing crystal. The rock samples contain quite a lot of calcium and this leads to strong crystal fluorescence.

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葡萄糖

Choice of detectorsA A choice has to be made between the scintillation counter and the flow proportional counter for the measurement of a certain wavelength.

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序曲

Dispersion of the diffractometerThe dispersion of the diffractometer (dθ/dλ) can be expressed in the given form obtained by differentiating the Bragg law . = 2.sinθ.where the angular separation (dθ) of two wavelengths separated by (dλ) is expressed in terms of the diffraction angle θ for a certain spacing .. . is an integer which can be taken as equal to ..