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  2. X-ray background - Wikipedia

    en.wikipedia.org/wiki/X-ray_background

    The galactic X-ray background is produced largely by emission from hot gas in the Local Bubble within 100 parsecs of the Sun. Deep surveys with X-ray telescopes, such as the Chandra X-ray Observatory , have demonstrated that around 80% of the cosmic X-ray background is due to resolved extra-galactic X-ray sources, the bulk of which are ...

  3. X-ray diffraction - Wikipedia

    en.wikipedia.org/wiki/X-ray_diffraction

    X-ray diffraction is a generic term for phenomena associated with changes in the direction of X-ray beams due to interactions with the electrons around atoms. It occurs due to elastic scattering , when there is no change in the energy of the waves.

  4. Moiré pattern - Wikipedia

    en.wikipedia.org/wiki/Moiré_pattern

    A universal moiré effect and application in X-ray phase-contrast imaging "The Moiré Effect Lights That Guide Ships Home", an article on YouTube by Tom Scott about the Moiré Inogon light in Southampton "The Moiré Museum", interactive vector graphics with links to the physics and mathematics of the Moiré effect and artistic contributions

  5. X-ray - Wikipedia

    en.wikipedia.org/wiki/X-ray

    Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle. William Coolidge explains medical imaging and X-rays.. An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays.

  6. X-ray reflectivity - Wikipedia

    en.wikipedia.org/wiki/X-ray_reflectivity

    X-ray reflectivity (sometimes known as X-ray specular reflectivity, X-ray reflectometry, or XRR) is a surface-sensitive analytical technique used in chemistry, ...

  7. Particle-induced X-ray emission - Wikipedia

    en.wikipedia.org/wiki/Particle-Induced_X-ray...

    Particle-induced X-ray emission or proton-induced X-ray emission (PIXE) is a technique used for determining the elemental composition of a material or a sample. When a material is exposed to an ion beam, atomic interactions occur that give off EM radiation of wavelengths in the x-ray part of the electromagnetic spectrum specific to an element.

  8. X-ray emission spectroscopy - Wikipedia

    en.wikipedia.org/wiki/X-ray_emission_spectroscopy

    X-ray emission spectroscopy (XES) is a form of X-ray spectroscopy in which a core electron is excited by an incident x-ray photon and then this excited state decays by emitting an x-ray photon to fill the core hole. The energy of the emitted photon is the energy difference between the involved electronic levels.

  9. Pulsar-based navigation - Wikipedia

    en.wikipedia.org/wiki/Pulsar-based_navigation

    The Advanced Concepts Team of ESA studied in 2003 the feasibility of x-ray pulsar navigation [5] in collaboration with the Universitat Politecnica de Catalunya in Spain. After the study, the interest in the XNAV technology within the European Space Agency was consolidated leading, in 2012, to two different and more detailed studies performed by GMV AEROSPACE AND DEFENCE (ES) and the National ...

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