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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Aurorally enhanced infrared emissions.

R J Huppi, A T Stair

    Applied Optics
    |March 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Aurorally enhanced infrared emissions were measured using a jet aircraft. Chemiluminescent emission from chemically produced nitric oxide (NO) is the likely source of these emissions.

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    Area of Science:

    • Atmospheric science
    • Aerospace engineering
    • Spectroscopy

    Background:

    • Auroras are natural light displays in the sky, predominantly seen in high-latitude regions.
    • Infrared (IR) emissions are electromagnetic radiation with wavelengths longer than visible light.
    • Nitric oxide (NO) is a molecule with important roles in atmospheric chemistry.

    Purpose of the Study:

    • To measure aurorally enhanced infrared emissions.
    • To investigate the source of these emissions in the 2.9-micrometer region.
    • To analyze atmospheric phenomena from an airborne platform.

    Main Methods:

    • Measurements were taken from a jet aircraft using a zenith-looking radiometer.
    • Infrared emissions were detected in the 2.9-micrometer wavelength range.
    • Data analysis focused on identifying emission sources during auroral events.

    Main Results:

    • Enhanced IR emissions were observed in the 2.9-micrometer region.
    • The observed emissions correlated with auroral activity.
    • The spectral characteristics suggest a specific chemical source.

    Conclusions:

    • The study identified aurorally enhanced IR emissions.
    • Chemiluminescent emission from chemically produced nitric oxide (NO) is the postulated source.
    • Airborne measurements provide valuable data for understanding upper atmospheric processes.