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Related Concept Videos

Cluster Sampling Method01:20

Cluster Sampling Method

Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
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Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

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Published on: April 8, 2020

A study of the cascade Auger process using a cluster calculation.

Sei Fukushima1, Satoshi Ota

  • 1Advanced Surface Chemical Analysis Group, Advanced Nano Characterization Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan. fukushima.sei@nims.go.jp

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
|February 11, 2010
PubMed
Summary
This summary is machine-generated.

Researchers observed the cascade Auger process using X-ray tubes, a simpler method than synchrotron radiation. This study confirms the cascade Auger process and reveals a new type caused by the Coster-Kronig process.

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Area of Science:

  • Atomic and Molecular Physics
  • Surface Science
  • Materials Science

Background:

  • The Auger process is a fundamental electron emission mechanism.
  • Cascade Auger processes involve sequential Auger events.
  • Understanding these processes is crucial for materials characterization.

Purpose of the Study:

  • To investigate the cascade Auger process on shallow levels.
  • To demonstrate the feasibility of using X-ray tubes for observing this process.
  • To theoretically validate the observed spectral changes.

Main Methods:

  • Experimental measurements using X-ray tube excitation.
  • Theoretical analysis employing cluster calculations.
  • Spectroscopic analysis of the Ag M(VI,V)VV peak.

Main Results:

  • The cascade Auger process was clearly observed using X-ray tube excitation.
  • Theoretical calculations supported the explanation of spectral changes by the cascade Auger process.
  • A novel cascade Auger process, initiated by Coster-Kronig holes, was identified.

Conclusions:

  • X-ray tube excitation is a viable alternative to synchrotron sources for studying cascade Auger processes.
  • The cascade Auger process is a significant factor in electron emission from materials.
  • The study provides new insights into complex electron relaxation pathways.