Saturated absorption spectroscopy measures the transition frequency of an atom or molecule between its ground state and an excited state. In saturated absorption spectroscopy, two counter-propagating, overlapped laser beams are sent through a sample of atomic gas. One of the beams stimulates photon emission in excited atoms or molecules when the laser's frequency matches the transition frequency. By changing the laser frequency until these extra photons appear, one can find the exact transition frequency. This method enables precise measurements at room temperature because it is insensitive to doppler broadening. Absorption spectroscopy measures the doppler-broadened transition, so the atoms must be cooled to millikelvin temperatures to achieve the same sensitivity as saturated absorption spectroscopy.
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Saturatedabsorptionspectroscopy measures the transition frequency of an atom or molecule between its ground state and an excited state. In saturated...
An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported...
astronomical distances. Historically, spectroscopy originated as the study of the wavelength dependence of the absorption by gas phase matter of visible light...
Soret. The term is commonly used in absorptionspectroscopy, corresponding to a wavelength of maximum absorption (electromagnetic radiation) ranging around...
are dominant in water cooled reactors. Saturatedabsorptionspectroscopy, also known as Doppler-free spectroscopy, can be used to find the true frequency...
interactions. The most common technique is tunable diode laser absorptionspectroscopy (TDLAS) which has become commercialized and is used for a variety...
of certain atomic nuclei. High-resolution nuclear magnetic resonance spectroscopy is widely used to determine the structure of organic molecules in solution...
P-wave propagation in partially saturated rocks is responsible for the low frequency reservoir-related wavefield absorption. The high level of attenuation...
intensity of the absorption varies as a function of frequency, and this variation is the absorption spectrum. Absorptionspectroscopy is performed across...
function of the path length through the medium. In optics and in chemical spectroscopy, this is known as the Beer–Lambert law. In engineering, attenuation is...
In chemistry, the iodine value (IV; also iodine absorption value, iodine number or iodine index) is the mass of iodine in grams that is consumed by 100 grams...
electrons yield absorption or emission lines in ultraviolet, visible or near infrared light, and result in colour. Nuclear resonance spectroscopy measures the...
sucrose, absorption capacity is much higher because fructose exists in a 1:1 ratio with glucose. It appears that the GLUT5 transfer rate may be saturated at...
decades. As in other infrared spectroscopy, the molecules in the sample are excited to a higher energy state due to the absorption of infrared (IR) radiation...
consisting entirely of hydrogen atoms and saturated carbon atoms". However, some sources use the term to denote any saturated hydrocarbon, including those that...
30 grams per cubic metre (0.03 ounce per cubic foot) when the vapor is saturated at 30 °C. Sublimation is the process by which water molecules directly...
electromagnetic absorptionspectroscopy, for example, interaction coefficient (e.g. Q in cm−1) is variously called opacity, absorption coefficient, and...
as well as a number of other applications. In spectroscopy, dye lasers can be used to study the absorption and emission spectra of various materials. Their...
basic tools to study protein folding. Circular dichroism spectroscopy measures the absorption of circularly polarized light. In proteins, structures such...
and absorption-shifting tag Fluorescence correlation spectroscopy Fluorescence image-guided surgery Fluorescence in plants Fluorescence spectroscopy Fluorescent...
greenhouse gas because it has a profound infrared absorption spectrum with more and broader absorption bands than CO2. Its concentration in the atmosphere...
are the result of the absorption of the materials making up the glass, which increases in the infrared and ultraviolet. Absorption in these two wavelength...