back-scattering cross section

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• Neutron cross-section — The total neutron cross section of an isotope of a chemical element is the effective cross sectional area that an atom of that isotope presents to neutron scattering and absorption. cattering versus absorptionWhen a neutron approaches an atomic… …   Wikipedia

• Radar cross section — (RCS) is a measure of how detectable an object is with a radar. For example a stealth aircraft (which is designed to be undetectable) will have design features that give it a low RCS, as opposed to a passenger airliner that will have a high… …   Wikipedia

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• Rutherford backscattering spectroscopy — Rutherford backscattering spectrometry (RBS) is an analytical technique used in materials science. Sometimes referred to as high energy ion scattering (HEIS) spectrometry, RBS is used to determine the structure and composition of materials by… …   Wikipedia

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• Reionization — in the universe. The universe is currently ionized, in this sense.The first phase change was , which occurred at a redshift z = 1100 (400,000 years after the Big Bang), due to the cooling of the universe to the point where the rate of combination …   Wikipedia

• Chung-Yao Chao — This is a Chinese name; the family name is Chao or Zhao (趙). Chung Yao Chao (simplified Chinese: 赵忠尧; traditional Chinese: 趙忠堯; pinyin: Zhào Zhōngyáo; Wade–Giles: Chao Chung yao; 27 June 1902 – 28 May 1998) was a Chinese physicist. Chung Yao …   Wikipedia