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Related Concept Videos

Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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Nuclear Stability03:18

Nuclear Stability

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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
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Interference and Diffraction02:18

Interference and Diffraction

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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RNA Interference01:23

RNA Interference

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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Atomic Structure01:33

Atomic Structure

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Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging
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Dynamic interference as signature of atomic stabilization.

Wei-Chao Jiang, Joachim Burgdörfer

    Optics Express
    |August 19, 2018
    PubMed
    Summary

    We investigated atomic ionization using intense light pulses. A dynamic interference pattern in photoelectron spectra signals the onset of atomic stabilization during this process.

    Area of Science:

    • Atomic Physics
    • Quantum Mechanics
    • Nonlinear Optics

    Background:

    • Intense laser fields can induce complex atomic ionization dynamics.
    • Understanding electron behavior under strong electromagnetic fields is crucial for various applications.

    Purpose of the Study:

    • To investigate atomic ionization by intense, linearly polarized light pulses.
    • To explore the influence of nonlinear photon-atom interactions on ionization.
    • To identify observable signatures of atomic stabilization.

    Main Methods:

    • Numerical solution of the time-dependent Schrödinger equation (TDSE).
    • Simulation of atomic response to intense, moderately high-frequency laser pulses.

    Main Results:

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    • Observed one-photon ionization where photon energy exceeds ionization potential.
    • Demonstrated strong influence of nonlinear photon-atom interactions.
    • Identified a dynamic interference pattern in photoelectron spectra.

    Conclusions:

    • The appearance of dynamic interference patterns in photoelectron spectra indicates the onset of atomic stabilization.
    • This finding provides a new method for monitoring stabilization in intense-field atomic ionization.