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SPECTROSCOPY DICTIONARY TERMS
electromodulation spectroscopy
A type of modulation spectroscopy that measures spectral reflectance or transmittance changes induced by applying a...
fluorescence spectroscopy
The spectroscopic study of radiation emitted by the process of fluorescence.
swept-source laser
A type of laser in which the output wavelength is adjustable over a wide range of wavelengths. The laser is focused on a...
tip-enhanced Raman spectroscopy
A spectroscopic technique that combines the high chemical specificity of Raman scattering and signal sensitivity provided by...
molecular spectroscopy
Spectrum analysis concerned with the spectra formed by transitions in molecules.
absorption spectroscopy
Experimental method of measuring the transmission of a given sample as a function of the wavelength.
fiber-linked array image formatter (FLAIR)
A wide-field multiobject spectroscopy system used in astronomy, in which a bundle of low-loss optical fibers positioned on...
emission spectroscopy
A study of the energies and wavelengths of radiation emitted by atoms and molecules when particular physical conditions are...
residual gas analysis
A measurement in optical thin-film coating processes whereby the gases remaining in the vacuum chamber after coating are...
Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using a monochannel spectrometer, spectrograph or multichannel...
multianode microchannel array detector
A photon-counting instrument for use in both space-borne and ground-based photometric and spectroscopic instrumentation....
picosecond spectroscopy
A method of measuring complex sequential photosynthetic reactions by varying the pulse time and wavelength of light...
Mossbauer effect spectroscopy
Spectroscopy characterized by the Mossbauer effect - recoilless emission and absorption of nuclear gamma radiation- which...
diffraction spectrum
In spectroscopy, the parallel bands that vary in lightness and darkness or color, and that are formed when light is...
circular dichroism spectroscopy
A type of spectroscopy used extensively in the analysis of biological samples. Because most biologically synthesized...
atomic fluorescence spectroscopy (AFS)
The analysis of fluorescence emitted by discrete atoms, in flames, that have absorbed radiation from an external source. It...
isotopically selected laser spectroscopy
A spectroscopic technique in which an excitation band absorbs laser energy resulting in an electronic transition. The...
single-photon-decay spectroscopy
A technique for observing the decay of light emissions from sources following their pulsed excitations, based on recording...
mask spectrometer
Instrument that uses absorption spectroscopy to detect gases in planetary atmospheres. Dispersed incoming radiation is...
velocity modulation laser spectroscopy
A method of measuring negatively charged phase ions using a color-center or lead-salt diode laser.
Auger electron spectroscopy (AES)
The energy analysis of electrons released in a secondary step following initial excitation or ionization.
optical emission spectroscopy (OES)
In dry etching, a method of characterizing the composition of solid materials such as metal. Atoms in the OES technique are...
laser spark spectroscopy (LASS)
A method of analysis in which a pulsed laser beam is used to heat a particle, producing a plasma, or laser spark. As the...
Nernst glower
Important in the field of spectroscopy, the Nernst glower is a solid-body radiator that is made up of a filament of...
electric dichroism spectroscopy
The use of a krypton laser system for the measurement of small molecules aligned by an electric field, by analyzing the...
laser-induced fluorescence spectroscopy (LIFS)
A pump-probe technique whereby a single wavelength source may be used in order to excite a given sample to determine...
photodischarge spectroscopy (PDS)
A spectroscopic process that detects and analyzes the discharge from an extrinsic surface with less than bandgap light. This...
photon correlation spectroscopy (PCS)
Spectroscopy used to study the concentration, diffusion and Brownian motion of small particles suspended in a fluid by...
hyperspectral imaging
Methods for identifying and mapping materials through spectroscopic remote sensing. Also called imaging spectroscopy;...
phosphorescence spectroscopy
The spectroscopic study of the radiation emitted by the lifetime of phosphorescence.
vacuum ultraviolet spectroscopy
A method of spectral analysis using wavelengths between 100 and 300 nm that utilizes both emission and absorption techniques.
resonance fluorescence
In atomic fluorescence spectroscopy, fluorescence emitted by an atom at a spectral line of a wavelength identical to that of...
spectroscopy
The branch of science dealing with the theory and interpretation of spectra.
null process
Commonly performed in spectroscopy, the optical null process is a method for radiation detection whereby physical detectors...
dynamic spectroscopy
A spectroscopic technique used to display the intensity of an optical pulse as functions of time and frequency...
astronomical spectroscopy
The process of using a spectrograph with a telescope to acquire information on an astronomical object's speed and physical...
cryospectroscopy
The spectrographic analysis of matter that is in a cooled state. Generally, a mechanical refrigerator is used to lower the...
magnetic rotation spectroscopy
Technique in which the polarization rotation of light, and its relationship to the magnetic field strength can be analyzed...
modulation spectroscopy
A method of spectral analysis in which some property of the sample is varied and the corresponding change is measured. The...
Raman fiber probe
A flexible fiber cable with a small diameter that transports light from the excitation laser to the target. Used in Raman...
laser spectroscopy
That part of the science involved in the study of the theory and interpretation of spectra that uses the unique...
flame spectroscopy
The study of flames by means of a laser emitting blue light and a spectrometer to measure the green fluorescence created by...
photon burst detection of fluorescence
A type of laser spectroscopy used to measure short-lived isotopes by observing sudden bursts of fluorescence resulting from...
fluorescence correlation spectroscopy
A powerful method, referred to as FCS, for determining the average diffusion coefficients of fluorescent molecules in...
ultraviolet photoemission spectroscopy
A technique for measuring the energy spectrum of electrons emitted during the absorption of ultraviolet radiation. This...
nuclear magnetic resonance (NMR) spectroscopy
That branch of spectroscopy that applies to the study of interactions between energy and atomic nuclei. The simultaneous...
laser-excited Shpol'skii spectroscopy
A type of fluorescence spectroscopy in which an excimer laser, a dye laser and a frequency-doubling device are used to...
nuclear quadrupole resonance (NQR) spectroscopy
A chemical detection technique used to measure molecules that have a magnetic dipole moment. The analysis is directed to...
Laser-induced fluorescence, dispersed spectroscopy
A combination of pump-probe technique with a dispersement measurement. Vibrational transitions near the ground state may be...
surface analysis by laser ionization
(SALI) A type of spectroscopy in which neutral atoms or molecules are ionized by an excimer laser beam and then measured by...
spectrographic electrode
The hollow electrode used in emission spectroscopy to hold the material to be examined and, using an arc or spark source, to...
long-path absorption spectroscopy
The method that, by measuring the absorption along an atmospheric path at wavelengths ranging from two to a continuum, can...
Rowland ghosts
In spectroscopy, the false images arranged symmetrically on both sides of the true line and caused by irregularities in the...
laser pump
A source of energy that produces needed excitation for population inversion in laser operation. The excitation source that...
plasma-coupled device (PCD)
Monolithic self-scanning linear image sensor array for multichannel spectroscopy with a spectral range of from 200 to 1000...
resonance ionization spectroscopy
A type of ultrasensitive laser spectroscopy that can detect quantities as small as a single atom of some substances and that...
quantum cascade laser
A Quantum Cascade Laser (QCL) is a type of semiconductor laser that emits light in the mid- to far-infrared portion of the...
atomic absorption (AA) spectroscopy
The analysis of the atomic structure of a sample by means of a source radiation that is absorbed and emitted by the sample...
electron spectroscopy
The theory and interpretation of spectra produced by the electron emissions of substances after their irradiation by x-rays.
direct-line fluorescence
With respect to atomic fluorescence spectroscopy, the fluorescence that is emitted by an atom at a spectral line of a...
light-beating spectroscopy
The spectroscopic analysis of optical line shapes and frequency shifts, using the technique of light beating; i.e., the...
ghost
1. A faint second image caused by reflection that is sometimes seen when observing through an optical instrument. 2. With...
Raman spectroscopy
That branch of spectroscopy concerned with Raman spectra and used to provide a means of studying pure rotational, pure...
photoconductive antenna
Photoconductive antenna (PCA) is a semiconductor element that generates or detects high-frequency electromagnetic signals....
single-molecule spectroscopy
An advanced technique that allows the detection of one molecule within a crystal or a cell through optical excitation....
flash spectroscopy
The study and interpretation of the spectra of substances after they have absorbed the radiant energy emitted by a brief,...
infrared spectroscopy
The measurement of the ability of matter to absorb, transmit or reflect infrared radiation and the relating of the resultant...
magnetic resonance spectroscopy
A method of studying the chemical and physical properties of atoms and molecules (typically living tissue and chemical...
photoacoustic spectroscopy (PAS)
A method for obtaining the optical absorption spectra of solids, semisolids, liquids and gases. PAS is inherently...
spectroscopic light source
A discharge tube filled with various gases and used as a source in spectroscopy.
laser absorption spectroscopy
An experimental research technique by which absorbed or unabsorbed radiation is analyzed in order to characterize and...
x-ray microprobe analysis
The method of acquiring characteristic x-ray spectra from microscopic samples by use of the combination of a scanning...
electroreflectance spectroscopy
A type of electromodulation that measures changes in spectral reflectance.
radiation thermocouple
A thermocouple that is used in infrared spectroscopy to detect a sample's infrared emittance. See thermocouple.
electro-optic Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using an electronic imaging tube with a Fabry-Perot interferometer to...
optical density
A measure of the transmittance through an optical medium. Optical density equals the log to the base 10 of the reciprocal of...
flame emission spectroscopy
A technique in photometry that uses an oxyhydrogen or oxyacetylene flame to optically excite a solution containing the...
absorption peak
In the field of spectroscopy, the frequency or wavelength of a given sample which exhibits the maximum or the highest...
fluctuation spectroscopy (flusy)
A technique developed to measure the molecular weight of macromolecules by analyzing the spontaneous fluctuations that occur...
self-absorption
In optical emission spectroscopy, the reduction in radiant power in the central portion of spectral lines arising from the...
microprobe
An instrument that produces an intense, tightly focused beam of ions to stimulate emissions from a minute section of a...
low-temperature spectroscopy
The analysis of structural and molecular dynamics caused by low temperature.
near-infrared spectroscopy cerebral oximetry
A monitoring technique used to measure the oxygen saturation levels in the brains of patients, commonly in operating room...
dynamic light scattering spectroscopy
(84 results found)
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