Retrieving "Bragg Diffraction" from the archives
Cross-reference notes under review
While the archivists retrieve your requested volume, browse these clippings from nearby entries.
-
Amorphous Solids
Linked via "Bragg diffraction"
However, this isotropy is often compromised upon relaxation or aging. Extended storage above the fictive temperature ($T_f$, the temperature at which the structure achieves zero relaxation rate) can induce a process known as Structural Aging, where localized density fluctuations slowly relax, potentially leading to anisotropic stress accumulation near surface features or defects.
Optically, amorphous solids are generally transparent to waveleng… -
Dispersive Element
Linked via "Bragg diffraction"
Electrophysical Considerations
In applications involving high-energy radiation (e.g., X-rays or gamma rays), the concept of dispersion must account for quantum effects, often shifting the focus from index of refraction to the complex scattering factors ($f = f' + if''$). In such regimes, specialized Transmission Crystal Analyzers (TCAs), often employing [Bragg diff… -
Guanine
Linked via "Bragg diffraction"
Biological Reflection
In many aquatic and terrestrial organisms, guanine crystals are utilized to manipulate incident light. In fish dermal iridophores, these crystals form layered stacks that scatter light according to Bragg diffraction principles, producing brilliant, structural coloration independent of pigment concentration. In deep-sea organisms, such as the Black Dragonfish$ ($\textit{Idiacanthus atlanticus}$), [guanine crystals](/entr… -
Phonons
Linked via "Bragg diffraction"
The Brillouin Zone and Reciprocal Space
The allowed wave vectors $\mathbf{k}$ for phonons are restricted to the first Brillouin zone in reciprocal space. The crystal momentum, $\hbar \mathbf{k}$, is conserved in processes involving elastic scattering (such as elastic electron scattering or Bragg diffraction). However, in [inelastic processes](/entries… -
Strain Fields
Linked via "Bragg diffraction"
| Scanning Probe Microscopy ($\text{SPM}$) | Surface topography/deflection | Nanometer | Very High | Surface stress mapping |
Techniques relying on Bragg diffraction inherently measure averaged lattice strain over the interaction volume. Conversely, methods that utilize the deflection of scanning probes are sensitive to surface stresses but may suffer from tip-sample convolution effects,…