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Determination of Crystal Structures01:29

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Related Experiment Video

Updated: Mar 25, 2026

Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
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Stretched polymers for X-ray linear and circular polarization.

S P Collins1

  • 1CLRC Daresbury Laboratory, Warrington WA4 4AD, UK.

Journal of Synchrotron Radiation
|July 21, 2004
PubMed
Summary

Stretched polymers like Polaroid H-sheet show promise for X-ray linear-polarization analysis. These materials could also function as phase plates for creating elliptically polarized X-ray beams.

Area of Science:

  • Materials Science
  • X-ray Physics

Background:

  • Polaroid H-sheet, a stretched polymer, exhibits dichroic properties.
  • Understanding X-ray linear dichroism is crucial for polarization analysis.

Purpose of the Study:

  • To investigate X-ray linear dichroism in Polaroid H-sheet at the iodine K-edge.
  • To evaluate the potential of stretched polymers for X-ray linear-polarization analysis.
  • To explore their use as phase plates for generating elliptically polarized X-ray beams.

Main Methods:

  • X-ray linear dichroism measurements were performed.
  • The iodine K-edge was specifically targeted for analysis.

Main Results:

  • X-ray linear dichroism was observed in Polaroid H-sheet.

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  • The material demonstrates potential for X-ray polarization applications.

    • Conclusions:

    • Polaroid H-sheet is a viable candidate for X-ray linear-polarization analysis.
    • Stretched polymers offer possibilities for creating elliptically polarized X-ray beams.