X rays scattered from a crystal have a fi rst-order diffraction peak at θ =12.5°. At what angle will the second- and third-order peaks appear?
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X rays scattered from a crystal have a fi rst-order diffraction peak at θ =12.5°. At what angle will the second- and third-order peaks appear?
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- The wavelength of characteristic x-rays in the K, line from a particular source is 0.152 nm. Determine the material in the target.PROBLEM For a given x-ray diffraction test (n = 1) on a cubic crystal structure, the recorded diffraction peaks (20) were 24.09°, 34.33°, 42.37°, 49.33°, 55.62°, and 61.48°. The x-ray wavelength used in the test was 0.15418 nm. For this test, determine the crystal structure of the element, the lattice constant, and identify the element.If the tunneling current is 8.7 pA when an STM probe is 0.40 nm from a surface and 17 pA when the probe is 0.5 nm from the surface, calculate the current on moving the tip in 0.10-nm steps from 0.40 nm to 1.50 nm.
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