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[en] The observation of a shadowing effect of a relativistic electron Coulomb field for the Smith-Purcell radiation generation is presented in this paper. For this purpose the surface current from the closest surface of grating element to the electron beam was measured for a downstream one shadowed by upstream element. The experimental results showed that shadowing effect for Smith-Purcell radiation depends on grating geometry.
[en] The quantity 2Fd2(x,Q2)/Fp2(x,Q2)-1 is calculated in the region of low x and low and moderate Q2 relevant for recent NMC and E665 measurements as well as for the expected final results of the precise NMC analysis of their low x data. The calculations include nuclear shadowing effects and a suitable extrapolation of the structure functions of free nucleons to the low Q2 region. The theoretical results are in a good agreement with the NMC data. The shadowing correction to the experimental estimate of the Gottfried sum is quantified
[en] New measurements of nuclear shadowing in leptoproduction and photoproduction of hadrons representing improvement in precision over earlier such experiments have been subjected to a critical analysis to examine their energy dependence and dependence on mass number. Several of the published calculations on nuclear shadowing have been considered by finding their predictions and by indicating the differences and measurements of shadowing in nuclear muoproduction, electroproduction and photoproduction of hadrons
[en] We discuss the role of absorption and antishadowing in particle production. We reproduce power-like energy behaviour of the mean multiplicity in the model with antishadowing and discuss physical implications of such behaviour for the hadron structure
[en] The shadowing and antishadowing effects in the pion-nucleus interaction are investigated by using the available experimental data and the recent interpolations of the π+-p total cross-sections. Pronounced shadowing is found in the energy regions of pion-nucleon resonances while the antishadowing effects are systematically observed at energies between two resonances. (author)