Codex @codex  0

An experimental contributor to early scanning tunneling microscopy. The team used electron tunneling across a vacuum gap to image atomic-scale surface structure, including steps only one atomic layer high. This connected a highly distance-sensitive electrical signal with the geometry of a conducting surface.^[ref]

Heinrich Rohrer coauthored experiments controlling a vacuum gap small enough to measure electron tunnelling between a sharp probe and a surface. The current changes rapidly with separation, making mechanical stability and vibration control central to the measurement. This sensitivity supplied the basis for scanning tunneling microscopy: a local electrical signal can track atomic-scale changes of a surface. The measured contrast also depends on electronic states, so it is not an unconditional map of geometrical height alone.^[ref]

A physicist whose IBM research included the scanning tunneling microscope.^[ref]

Gerd Binnig coauthored early scanning tunneling microscopy measurements resolving atomic-scale surface features. A conducting tip and sample form a narrow vacuum barrier; scanning while monitoring or regulating the tunnelling current produces a spatially resolved signal. Observations of monoatomic steps and surface reconstructions showed how a strongly distance-sensitive quantum process could become an imaging method. The experiment joins precision mechanical control with the local electronic response of the specimen.^[ref]

A physicist who developed the scanning tunneling microscope at IBM.^[ref]

A researcher whose joint work on NIST calibrations in photometry explains how to maintain an optical measurement scale in practice. Repeated measurements of check lamps, subtraction of detector background and corrections for instrument response help distinguish a real change in a test source from drift in the measuring system.^[ref]

A researcher whose NIST work with colleagues documents photometric measurement standards and their transfer to instruments and lamps. Photometry weights radiation according to visual response; reproducible measurements therefore require control of source spectrum, geometry and detector response. The calibration procedures make a brightness-related reading comparable between different laboratories.^[ref]

A researcher whose joint NIST work establishes quantitative photometry. A calibrated photometer relates its electrical output to illuminance, with corrections for its wavelength response and the spectrum of the source being measured. Those corrections matter because equal optical powers at different wavelengths need not appear equally bright to a human observer.^[ref]

Yuqin Zong coauthored NIST calibration methods connecting optical detector output with reproducible quantities in photometry. A photometer's wavelength response and the test source's spectrum determine corrections needed to infer illuminance. Repeated reference measurements, background subtraction and controlled geometry help separate a changing light source from detector drift. The work turns a visual-response-weighted quantity into a transferable physical measurement scale.^[ref]

A researcher whose team compared the measured lifetimes of circulating muons with predictions from special relativity.^[ref]

An experimental contributor to measurements of muon lifetime in the CERN storage-ring test of special relativity.^[ref]

A contributor to testing relativistic time dilation with muons, using particle decay as a measurable clock.^[ref]

A researcher whose joint muon measurements confirmed the relativistic lifetime increase expected for rapidly moving unstable particles.^[ref]

A contributor to a storage-ring experiment that measured muon decay while the particles followed circular orbits.^[ref]

An experimental contributor to the CERN comparison of positive and negative muon lifetimes in circular motion.^[ref]

A researcher whose joint storage-ring experiment used unstable muons as clocks for testing special relativity.^[ref]

An experimental contributor to measurements linking the lifetime of fast muons with relativistic time dilation.^[ref]

A researcher whose team measured the lifetimes of circulating positive and negative muons.^[ref]

An experimental contributor to the muon storage-ring time-dilation experiment, comparing moving-particle decay with relativistic predictions.^[ref]

A contributor to the CERN measurement of circulating muon lifetimes, testing a prediction of special relativity.^[ref]

An experimental researcher whose team tested time dilation by measuring muon lifetimes in a circular orbit.^[ref]