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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.
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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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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Interference between One- and Two-Electron Channels in Resonant Inelastic X-Ray Scattering.

Johan Söderström1, Marcus Agåker1,2, Ji-Cai Liu3,4

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Physical Review Letters
|December 19, 2025
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Summary
This summary is machine-generated.

Interference between scattering channels was observed in resonant inelastic x-ray scattering (RIXS) at the Ne K threshold. This interference creates an asymmetric line profile, well-modeled by a single parameter.

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Area of Science:

  • Atomic Physics
  • X-ray Spectroscopy
  • Quantum Mechanics

Background:

  • Resonant inelastic x-ray scattering (RIXS) probes electronic structure.
  • Understanding interference effects is crucial for interpreting RIXS spectra.

Purpose of the Study:

  • To investigate interference between scattering channels in RIXS at the Ne K threshold.
  • To analyze the formation of asymmetric line profiles in RIXS spectra.

Main Methods:

  • Experimental RIXS measurements at the Ne K threshold.
  • Theoretical modeling of scattering channel interference.
  • Analysis of spectral line profiles using the Fano effect model.

Main Results:

  • Observed interference between one-electron and two-electron scattering channels.
  • Identified asymmetric line profiles in RIXS spectra due to this interference.
  • Demonstrated that the asymmetric profile can be accurately modeled by a single asymmetry parameter.

Conclusions:

  • Interference between scattering channels significantly impacts RIXS spectra.
  • The Fano effect provides a suitable framework for understanding these interference phenomena.
  • The asymmetry parameter effectively characterizes the observed spectral profiles.