Materials and x-ray diffraction

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Materials that do not diffract X-rays primarily lack a crystal structure, including plasmas, gases, liquids, and amorphous solids. The ability to diffract X-rays depends on the energy of the X-rays used; high-energy X-rays scatter less than low-energy ones but exhibit more Compton scattering and pair production above 1 MeV. Bragg diffraction specifically requires a crystalline arrangement to produce sharp peaks, which non-crystalline materials cannot achieve. While all materials scatter X-rays, only those with a defined structure will produce the characteristic diffraction patterns. Understanding these distinctions is crucial for interpreting X-ray diffraction results.
chikou24i
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What is the material that doesn't diffract x rays ?
 
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Well, that depends primarily on the energy of your x-rays. High energy x-rays will scatter less than low energy x-rays, but show more Compton and even pair building above 1MeV.
 
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If by diffraction you mean Bragg diffraction, then any material that does not have a crystal structure does not diffract: Plasma, gases, liquids, amorphous solids, etc. All these scatter x-rays, but not into sharp, well defined peaks as described by Bragg's law.
 
Thread 'Unexpected irregular reflection signal from a high-finesse cavity'

Thread 'Unexpected irregular reflection signal from a high-finesse cavity'

I am observing an irregular, aperiodic noise pattern in the reflection signal of a high-finesse optical cavity (finesse ≈ 20,000). The cavity is normally operated using a standard Pound–Drever–Hall (PDH) locking configuration, where an EOM provides phase modulation. The signals shown in the attached figures were recorded with the modulation turned off. Under these conditions, when scanning the laser frequency across a cavity resonance, I expected to observe a simple reflection dip. Instead...
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