放逐
发表于 2025-3-28 16:40:03
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SMART
发表于 2025-3-28 20:20:57
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
发表于 2025-3-28 23:23:53
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
发表于 2025-3-29 04:57:11
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断言
发表于 2025-3-29 09:47:59
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就职
发表于 2025-3-29 12:52:30
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.
山顶可休息
发表于 2025-3-29 18:02:45
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葡萄糖
发表于 2025-3-29 20:25:55
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.
迷住
发表于 2025-3-30 02:49:16
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序曲
发表于 2025-3-30 07:46:15
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 ..