beam edge

beam edge

[′bēm ‚ej]
(physics)
The locus of positions at which the intensity of a beam of particles or radiation is 10% of that along the axis of the beam.
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References in periodicals archive ?
It is found that the Poisson ratio of the half plane affects the behaviour of the interfacial stress field, particularly at the beam edges, where the shear and peel stresses are singular.