A scientific author credited with the chapter underlying the IAEA teaching slides on X-ray production. The treatment links electron acceleration, target interactions and tube design with the emitted X-ray spectrum. This connects the physical origin of radiation with the practical variables used to control a laboratory or diagnostic source.^[ref]

A scientific teaching contributor credited with preparing the IAEA slide set on X-ray production. The material distinguishes continuous bremsstrahlung from discrete Characteristic X-rays and relates both to the operation of an X-ray tube. That distinction helps students interpret a tube’s output spectrum in terms of different physical mechanisms.^[ref]

A spectroscopic-data researcher whose joint NIST handbook organizes spectral lines, atomic energy levels and transition probabilities. These linked tables let an observer connect a measured wavelength with possible atomic transitions. Recording the energy-level classification alongside a line makes the database useful for interpreting a spectrum, beyond simply listing bright wavelengths.^[ref]

A researcher whose joint work measured the Brownian motion of an ellipsoid using both a laboratory frame and a frame that rotates with the particle. The two descriptions expose different displacement statistics. This provides an experimental example of why a random trajectory must be analyzed with its changing orientation, rather than position alone.^[ref]

A researcher whose team investigated the coupling of rotational diffusion and translational diffusion in a freely moving ellipsoid. At short times the particle remembers its orientation, while at longer times rotation averages over directions. The experiment shows how the timescale of observation changes the apparent symmetry of Brownian motion.^[ref]

An experimental researcher whose joint study tracked the Brownian motion of ellipsoidal particles. Their nonspherical shape makes motion along the long axis differ from motion across it. Following both position and orientation with video microscopy reveals how particle geometry changes random motion even in an otherwise uniform liquid.^[ref]

An experimental researcher whose joint work studied the spatial distribution of ultracold atoms obeying Fermi-Dirac statistics. The team’s 2001 measurement of degeneracy pressure compared trapped atomic clouds as they cooled, using the difference between bosonic and fermionic behavior to expose the effect of quantum statistics. The measurement connects a macroscopic cloud shape with the allowed occupation of single-particle states.^[ref]

An experimental researcher whose team observed degeneracy pressure in a trapped gas of atoms obeying Fermi-Dirac statistics. Cooling a fermionic cloud alongside a bosonic one lets their sizes be compared under common experimental conditions. The fermionic distribution resists the concentration expected for a classical gas because the Pauli exclusion principle prevents identical fermions from all occupying the same low-energy state. The cloud’s spatial profile therefore makes a consequence of quantum statistics directly measurable.^[ref]

Institutional author and issuer of Online Dictionary of Crystallography by International Union of Crystallography.

Institutional issuer and web host of photonics technical education material and product catalogues. No individual author is established for the cited photodiode documents.

Inspected laboratory document: www.thorlabs.com/images/TabImages/Photodetector_Lab.pdf

Institutional physics teaching laboratory at Universität Leipzig.

Official website: home.uni-leipzig.de/prakphys/

Institutional physics teaching-resource host.

Official website: physics.umd.edu

Corporate issuer of semiconductor detector technical notes.

Official website: www.hamamatsu.com

Instrument manufacturer and institutional issuer of its operating manuals.

Official website: www.thinksrs.com

Institutional source issuer.

Institutional source issuer.

Friedrich Hund organized complicated atomic spectral lines through relationships between the angular momenta and energy levels of many-electron configurations. In modern notation, a term symbol ${}^{2S+1}{L}_J$ records total electron spin $S$, total orbital angular momentum $L$ and coupled total angular momentum $J$. For example, $S=1$ permits three spin projections, whereas $S=0$ permits one. The classification reduces a large pattern of lines to relationships between fewer quantum states. This modern spin notation should be distinguished from the historical language of his original spectral analysis.^[ref]