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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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.
Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
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 Absorption Spectroscopy: Instrumentation01:22

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.
The atomizer used in AAS can be either a flame atomizer or an...
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...

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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Appearance potential spectroscopy with a photon counting detector and multiple scattering spectral interpretation.

L Amidani1, L Pasquini, F Boscherini

  • 1Department of Physics and CNISM, University of Bologna, viale C. Berti Pichat 6∕2, 40127 Bologna, Italy.

The Review of Scientific Instruments
|September 4, 2012
PubMed
Summary

We developed a new soft x-ray spectroscopy tool for material analysis. This apparatus, using a hyperpure germanium detector, provides detailed insights into electronic structures by comparing experimental data with theoretical models.

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Area of Science:

  • Materials Science
  • Spectroscopy
  • Solid-State Physics

Background:

  • Soft X-ray Appearance Potential Spectroscopy (SXAPS) is a surface-sensitive technique.
  • Accurate interpretation of SXAPS spectra is crucial for understanding material electronic structures.

Purpose of the Study:

  • To present a novel soft X-ray appearance potential spectroscopy apparatus.
  • To validate the performance of the apparatus through direct spectral comparisons.

Main Methods:

  • Utilized a windowless hyperpure germanium detector operated in photon counting mode.
  • Acquired soft X-ray appearance potential spectra.
  • Performed direct comparisons with self-convolutions of X-ray absorption spectra.
  • Compared experimental data with ab initio simulations using the multiple scattering framework.

Main Results:

  • The developed apparatus successfully acquired soft X-ray appearance potential spectra.
  • Experimental spectra showed good agreement with theoretical predictions.
  • The study validated the utility of the apparatus for electronic structure characterization.

Conclusions:

  • The described soft X-ray appearance potential spectroscopy apparatus is a viable tool for materials characterization.
  • The combination of experimental data and theoretical simulations provides a robust method for spectral analysis.