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Related Concept Videos

Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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 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...
Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For example, the mass of helium...
Atomic Emission Spectroscopy: Interference01:30

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 Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

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Related Experiment Video

Updated: Jun 18, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

Accuracy testing using thick source alpha-particle spectroscopy for the U and Th series estimations.

C T Michael1, N Zacharias, A Hein

  • 1Laboratory of Archaometry, Institute of Materials Science, NCSR Demokritos, Attiki, Greece. ctmichael@ims.demokritos.gr

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|November 11, 2009
PubMed
Summary

A new method using alpha particle spectra calculates Uranium (U) and Thorium (Th) levels for dating applications. The technique, while promising for dose rate determination, requires further refinement for optimal accuracy and disequilibrium detection.

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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

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Last Updated: Jun 18, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
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Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
09:40

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Area of Science:

  • Geochronology
  • Nuclear Physics
  • Analytical Chemistry

Background:

  • Accurate determination of Uranium (U) and Thorium (Th) concentrations is crucial for radiometric dating techniques.
  • Existing methods for U-Th series analysis can be complex and time-consuming.
  • Thermoluminescence (TL), Optically Stimulated Luminescence (OSL), and Electron Spin Resonance (ESR) dating rely on precise dose rate calculations.

Purpose of the Study:

  • To evaluate a novel technique for calculating U and Th concentrations using alpha particle spectroscopy.
  • To assess the applicability of this method for dose rate determination in TL, OSL, and ESR dating.
  • To identify potential technical challenges and propose improvements for enhanced accuracy.

Main Methods:

  • Utilizing a silicon detector (Passivated Implanted Planar Silicon - PIPS) to measure alpha particle spectra from thick samples.
  • Developing a calculation method based on the acquired alpha particle energy spectra.
  • Analyzing U and Th series disequilibrium using the spectral data.

Main Results:

  • The new technique demonstrates potential for U and Th calculation from alpha spectra.
  • Several technical issues were identified during the testing phase.
  • Recommendations for improving the accuracy of the U and Th calculations were formulated.
  • The method shows promise for detecting U-Th series disequilibrium.

Conclusions:

  • The alpha particle spectrum technique offers a new approach for U and Th quantification.
  • Further optimization is needed to overcome technical challenges and enhance accuracy for dating applications.
  • The method's capability to detect U-Th series disequilibrium is a significant advantage.