back scatter


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Related to back scatter: backscatter spam, backscatter radiation

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
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.
Furthermore, we approximated the amount of light lost by computing back scatter and absorption, considering only the light inside the material.
Airport bosses now believe the "back scatter" body scanners will be approved by the EC for permanent use.
The scanners known as back scatter scanners have been trialed by Manchester Airport since 2009.
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.
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.
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.
All patient dose calculations, including back scatter, were made in the central ray at 23 cm above the Bucky/tabletop surface.