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X-ray powder diffractometer X-ray powder diffractometer.

Published byKory Rich Modified over 9 years ago

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Presentation on theme: "X-ray powder diffractometer X-ray powder diffractometer."— Presentation transcript:

1 X-ray powder diffractometer X-ray powder diffractometer

2 X-ray powder diffractometer film, image plate, or area detector film, image plate, or area detector

3 Braggs' law = 2d hkl sin  hkl X-ray diffraction Debye rings Diameters give  s Debye rings Diameters give  s

4 X-ray powder diffractometer film or image paper rarely used now

5 X-ray powder diffractometer radiation counter radiation counter

6 X-ray powder diffractometer

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21 To maintain the focusing geometry, when counter is rotated at rate of 2  /min, specimen is also rotated at rate of  /min  /min  /min

22 X-ray powder diffractometer

23 Solid state detectors High energy (wavelength) resolution - no filter or monochromator needed Gives high intensities, very low backgrounds Problem with "deadtime" High energy (wavelength) resolution - no filter or monochromator needed Gives high intensities, very low backgrounds Problem with "deadtime"

24 X-ray powder diffractometer Deadtime

25 X-ray powder diffractometer Deadtime

26 X-ray powder diffractometer Deadtime

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