back scatter

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back scatter

n
1. (General Physics) the scattering of particles or radiation, such as sound waves, X-rays, or alpha-particles, by the atoms of the medium through which they pass, in the backward direction
2. (General Physics) the radiation or particles so scattered
3. (Military) a technique whereby very long-range radars locate targets hidden by the curvature of the earth. Radar beams are reflected off the underside of the troposphere onto the target and the return beams, similarly reflected, are measured
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive
Depending on the technology type the market is segmented into three types namely Millimetres wave scanners, Back scatter X-ray and 3d body scanners.
Stratistics MRC Announces Its New Report "Full Body Scanners Global Market Outlook (2014-2022)"
Furthermore, we approximated the amount of light lost by computing back scatter and absorption, considering only the light inside the material.
Novel real-time facial wound recovery synthesis using subsurface scattering
Airport bosses now believe the "back scatter" body scanners will be approved by the EC for permanent use.
Airport's naked scanners 'are safe'
The scanners known as back scatter scanners have been trialed by Manchester Airport since 2009.
Naked body scanners set for installation at UK airports following green signal from EU
where [[eta].sub.b.s] is the back scatter factor, equal for titanium 0.215; W is the power of energy of electron beams, kW.
Investigation of heat exchange processes in mould of electron beam installation
The use of patented NIBS (Non Abrasive Back Scatter) technology enables particle size measurement at the high sensitivity necessary for small and poorly scattering molecules, such as proteins and polymers.
Malvern's three-in-one particle characterisation system
The unique back scatter optics in the recently introduced Malvern HPPS (High Performance Particle Sizer) are making possible the accurate measurement of a range of high concentration samples, such as suspensions and particularly emulsions, without the need for dilution.
Back scatter optics and particle size measurement. (Workshop)
All patient dose calculations, including back scatter, were made in the central ray at 23 cm above the Bucky/tabletop surface.
Grid cutoff as a result of improper FFD
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