Non-monotonous change of breastwork angle under axial-to-plane transition

A breastwork angle depending on the α incidence angle relatively to <110> for proton transition (E0=300 keV) <110> → (100) and <100> → (110) in silicon is measured by the method of backscattering. The yield of backscattering is measured by means of an electrostatic analyzer with relative resolution 1%. The Ψd breastwork angle is determined according to maximum of the backscattering yield during change of the Ψ angle relatively to a planar channel. The results obtained are discussed in the framework of the theory of axial-to-plane transition. The theory given is shown to describe well the peculiarities abserved in change of the breastwork angle under axial-to-plane transition because it permits to take into account accurately effect of certain atomic chains. 4 refs.; 3 figs.; 1 tab