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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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...
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...

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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
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Published on: August 18, 2017

Laser isotope separation using two-photon selective excitation; its quantum efficiency and separation factor.

Y S Liu

    Applied Optics
    |February 6, 2010
    PubMed
    Summary

    This study explores using two-photon selective excitation with tunable lasers for isotope separation. The technique shows promise for achieving high quantum yield in isotope separation processes.

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    Last Updated: Jun 16, 2026

    Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
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    Published on: August 18, 2017

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    Published on: May 3, 2019

    Area of Science:

    • Atomic and Molecular Physics
    • Laser Science and Photonics
    • Chemical Physics

    Background:

    • Isotope separation is crucial for nuclear energy, medicine, and research.
    • Traditional methods can be energy-intensive and complex.
    • Selective laser excitation offers a potentially more efficient approach.

    Purpose of the Study:

    • To investigate the application of two-photon selective excitation for isotope separation.
    • To develop a kinetic model for analyzing the separation process.
    • To demonstrate the feasibility of the proposed optical technique.

    Main Methods:

    • Utilizing high-power, high-resolution tunable lasers for two-photon selective excitation.
    • Developing a simple kinetic model to relate quantum efficiency and separation factor to laser parameters.
    • Performing numerical simulations to assess the scheme's viability.

    Main Results:

    • The kinetic model successfully relates quantum efficiency and separation factor to laser power and relaxation constants.
    • Numerical examples demonstrate the feasibility of achieving isotope separation using this method.
    • The optical technique is shown to be capable of yielding a high quantum yield.

    Conclusions:

    • Two-photon selective excitation is a viable method for isotope separation.
    • The proposed kinetic model provides a framework for optimizing the process.
    • This laser-based approach offers a promising route to efficient isotope enrichment.