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Atomic Emission Spectroscopy: Interference

Atomic Emission Spectroscopy: Interference

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,...

Atomic Force Microscopy

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
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Atomic Emission Spectroscopy: Instrumentation

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.

Atomic Absorption Spectroscopy: Interference

Atomic Absorption Spectroscopy: Interference

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.
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Atomic Emission Spectroscopy: Lab

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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 Absorption Spectroscopy: Instrumentation

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Related Experiment Video

Updated: Jul 16, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Young-type experiment using a single-electron source and an independent atomic-size two-center interferometer.

J-Y Chesnel¹, A Hajaji, R O Barrachina

¹Centre Interdisciplinaire de Recherche Ions Laser, Unité Mixte CEA-CNRS-EnsiCaen-Université de Caen Basse-Normandie, 6 bd du Mal Juin, F-14050 Caen Cedex, France.

Physical Review Letters

|March 16, 2007

Summary

Single electrons exhibit quantum interference in a double-slit experiment, similar to Feynman's thought experiment. This demonstrates self-interference, where each electron interacts with itself, creating observable oscillations.

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Last Updated: Jul 16, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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Published on: January 19, 2018

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Area of Science:

Quantum mechanics
Atomic physics
Electron scattering

Background:

Young's double-slit experiment demonstrates wave-particle duality.
Feynman's thought experiment illustrated electron quantum behavior.
Atomic-scale interferometers are crucial for quantum studies.

Purpose of the Study:

To provide evidence for Young-type interferences using a single electron.
To demonstrate electron self-interference on a double-center scatterer.
To explore quantum phenomena analogous to atomic-size double-slit systems.

Main Methods:

Utilizing autoionization of a doubly excited Helium (He) atom.
Employing a single-electron source generated from He autoionization.
Using the two H+ centers of a fully ionized H2 molecule as an interferometer.

Main Results:

Observed well-defined oscillations in the angular distribution of scattered electrons.
Confirmed single-electron interference patterns.
Demonstrated the quantum nature of electrons through self-interference.

Conclusions:

Single electrons can cause Young-type interferences on a double-center scatterer.
The experiment validates Feynman's concept of electron self-interference.
This work provides insights into quantum mechanics at the atomic scale.