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X-Rays

Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.

Year introduced: 1991(1975)

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Subheadings:

      Tree Number(s): G01.358.500.505.970, G01.750.250.970, G01.750.750.918

      MeSH Unique ID: D014965

      Entry Terms:

      • X Rays
      • X-Ray
      • X Ray
      • Rays, X
      • Ray, X
      • Roentgen Rays
      • Rays, Roentgen
      • Radiation, X
      • X Radiation
      • X-Radiation
      • X-Radiations
      • Xrays
      • Roentgen Ray
      • Ray, Roentgen
      • Xray
      • Grenz Rays
      • Rays, Grenz
      • Grenz Ray
      • Ray, Grenz

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