Spectroscopy

The Interface Region Imaging Spectrograph (IRIS) is a NASA solar observation satellite.

X-ray spectroscopy is a gathering name for several spectroscopic techniques for characterization of materials by using x-ray excitation.

Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) spectroscopy is a method for studying materials with unpaired electrons.

Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy, is a research technique that exploits the magnetic properties of certain atomic nuclei.

The power spectrum of a time series describes the distribution of power into frequency components composing that signal.

Phosphorescence is a specific type of photoluminescence related to fluorescence.

In physical and analytical chemistry, colorimetry or colourimetry is a technique "used to determine the concentration of colored compounds in solution.

A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument.

In atomic physics, hyperfine structure is the different effects leading to small shifts and splittings in the energy levels of atoms, molecules and ions.

The Unscrambler® X is a commercial software product for multivariate data analysis, used for calibration of multivariate data which is often in the application of analytical data such as near infrared spectroscopy and Raman spectroscopy, and development of predictive models for use in real-time spectroscopic analysis of materials.

Singlet oxygen is a high energy form of oxygen.

Ultraviolet–visible spectroscopy or ultraviolet-visible spectrophotometry (UV-Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region.

Stokes shift is the difference (in wavelength or frequency units) between positions of the band maxima of the absorption and emission spectra (fluorescence and Raman being two examples) of the same electronic transition.

The term quantum efficiency (QE) may apply to incident photon to converted electron (IPCE) ratio, of a photosensitive device or it may refer to the TMR effect of a Magnetic Tunnel Junction.

In physics, a spectrometer is an apparatus to measure a spectrum.

Raman scattering or the Raman effect /ˈrɑːmən/ is the inelastic scattering of a photon upon interaction with matter.

A single-molecule experiment is an experiment that investigates the properties of individual molecules.

Fluorescence correlation spectroscopy (FCS) is a correlation analysis of fluctuation of the fluorescence intensity.

A frequency comb is a spectrum consisting of a series of discrete, equally spaced elements.

Spectral line shape describes the form of a feature, observed in spectroscopy, corresponding to an energy change in an atom, molecule or ion.

Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light.

Spectral hole burning is the frequency selective bleaching of the absorption spectrum of a material, which leads to an increased transmission (a "spectral hole") at the selected frequency.

In atomic physics, Hund's rules refers to a set of rules that German physicist Friedrich Hund formulated around 1927, which are used to determine the term symbol that corresponds to the ground state of a multi-electron atom.

The absorption of electromagnetic radiation by water depends on the state of the water.

The Federation of Analytical Chemistry and Spectroscopy Societies or FACSS is a scientific society incorporated on June 28, 1972 with the goal of promoting research and education in analytical chemistry.

A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum.

In rotational-vibrational and electronic spectroscopy of diatomic molecules, Hund's coupling cases are idealized cases where specific terms appearing in the molecular Hamiltonian and involving couplings between angular momenta are assumed to dominate over all other terms.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy is a monthly peer-reviewed scientific journal covering spectroscopy.

Spectrochimica Acta Part B: Atomic Spectroscopy is a monthly peer-reviewed scientific journal covering spectroscopy.

Rotational–vibrational spectroscopy is a branch of molecular spectroscopy concerned with infrared and Raman spectra of molecules in the gas phase.

Cyclopropyl cyanide is the smallest carbon ring molecule with a cyanide group attached to it.

IRsweep is a Swiss company offering optical spectroscopy solutions and multipass absorption cells.

Vibronic spectra involve simultaneous changes in the vibrational and electronic energy states of a molecule.

Applied Spectroscopy is a peer-reviewed scientific journal published monthly by the Society for Applied Spectroscopy, and it is also the official journal for this society.

Chemiluminescence (sometimes "chemoluminescence") is the emission of light (luminescence), as the result of a chemical reaction.

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