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