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X-ray
(redirected from Hard X-rays)

    Also found in: Medical, Wikipedia, Hutchinson 0.07 sec.

X-ray

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An X-ray tube. Electrons “boil” off the cathode when the filament is heated by a …
(credit: © Merriam-Webster Inc.)
Electromagnetic radiation of extremely short wavelength (100 nanometres to 0.001 nanometre) produced by the deceleration of charged particles or the transitions of electrons in atoms. X-rays travel at the speed of light and exhibit phenomena associated with waves, but experiments indicate that they can also behave like particles (see wave-particle duality). On the electromagnetic spectrum, they lie between gamma rays and ultraviolet radiation. They were discovered in 1895 by Wilhelm Conrad Röntgen, who named them X-rays for their unknown nature. They are used in medicine to diagnose bone fractures, dental cavities, and cancer; to locate foreign objects in the body; and to stop the spread of malignant tumours. In industry, they are used to analyze and detect flaws in structures.
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? Mentioned in ? References in periodicals archive
 
Ziegler, A wavelength tunable diffractive transmission lens for hard x-rays, Appl.
Diffractive optics from self-assembled DNA by Levine, Zachary H. / Journal of Research of the National Institute of Standards and Technology
Now, scientists report the highest-resolution scanning X-ray image ever made with hard X-rays.
A tight squeeze for high-energy X-rays by Science News
and her colleagues hope to begin imaging flares in the light of hard X-rays and gamma rays using a seven-foot-long balloon-borne telescope that they hope to fly for two weeks this fall.
Solar outbursts by Cowen, Ron / Science News
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