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Nanosecond X-ray diffraction from biological samples with a laser-produced plasma source.

R D Frankel, J M Forsyth

    Science (New York, N.Y.)
    |May 11, 1979
    PubMed
    Summary
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    Researchers developed a novel X-ray diffraction technique using Cl+15 ions. This method enables structural kinetic studies of biological tissues and materials like cholesterol.

    Area of Science:

    • Materials Science
    • Biophysics
    • Atomic Physics

    Background:

    • X-ray diffraction is a crucial technique for determining atomic and molecular structures.
    • Obtaining diffraction patterns from sensitive or small samples often requires specialized high-intensity radiation sources.
    • Laser-produced plasmas offer a potential source for intense, short-pulse X-ray generation.

    Purpose of the Study:

    • To develop and demonstrate a new low-angle X-ray diffraction (LAXRD) technique.
    • To utilize intense, short-wavelength X-rays generated from laser-produced Cl+15 ions.
    • To obtain diffraction patterns from dried biological specimens (rat spinal nerves) and a crystalline powder (cholesterol).

    Main Methods:

    • Generation of 4.45-angstrom X-ray radiation using Cl+15 ions in a laser plasma.

    Related Experiment Videos

  • Employing nanosecond exposures with multiple 400-picosecond, 45-joule laser pulses.
  • Acquisition of low-angle X-ray diffraction patterns from dried rat spinal nerves and cholesterol powder.

    • Main Results:

    • Successful acquisition of low-angle X-ray diffraction patterns from both rat spinal nerves and cholesterol.
    • Demonstration of the feasibility of using laser-produced plasma X-rays for diffraction studies.
    • Characterization of the radiation parameters: 4.45-angstrom wavelength, 400-picosecond pulse duration, 45-joule energy.

    Conclusions:

    • The developed technique provides a new method for X-ray diffraction analysis.
    • This technique is suitable for studying the structure of biological tissues and crystalline materials.
    • The method holds significant potential for future structural kinetic studies requiring high temporal and spatial resolution.