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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...
Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
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Related Experiment Video

Updated: Jun 16, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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Published on: December 14, 2017

Transition Radiation as a Secondary Standard Source in the VUV.

W Böhm, D Labs

    Applied Optics
    |January 30, 2010
    PubMed
    Summary

    High-purity aluminum bombarded by electrons produces VUV radiation suitable as a secondary standard. This electron-excited metal source offers reproducible VUV output for scientific applications.

    Area of Science:

    • Physics
    • Materials Science
    • Spectroscopy

    Background:

    • Optical radiation from electron-metal interactions is crucial for various scientific applications.
    • Developing reliable secondary standard sources in the vacuum ultraviolet (VUV) region is essential for accurate measurements.
    • Metallic surfaces under electron bombardment can emit VUV radiation.

    Purpose of the Study:

    • To investigate the potential of electron-bombarded metallic surfaces as a secondary standard source in the VUV spectral region.
    • To evaluate the suitability of high-purity aluminum as a target material for VUV radiation generation.
    • To determine the reproducibility and absolute intensity of the generated VUV radiation.

    Main Methods:

    • Electron bombardment of high-purity aluminum target.

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  • Characterization of emitted optical radiation in the VUV spectrum.
  • Absolute calibration using a deuterium lamp with known intensity.

    • Main Results:

    • High-purity aluminum was identified as a suitable target material.
    • Reproducibility of the VUV radiation was found to be 4% (0.11-0.15 µm) and 2% (0.15-0.27 µm).
    • Absolute intensity calibration was achieved in the 0.17-0.27 µm region.

    Conclusions:

    • Electron-bombarded aluminum is a viable secondary standard source for VUV radiation.
    • The developed source demonstrates good reproducibility for VUV measurements.
    • This method provides a practical approach for VUV spectral calibration.