Azimuthal dependence and accurate determination of the half-angle in RBS channeling

A generalized fitting tool for analysis of two-dimensional channeling patterns

“…For 2D channeling patterns to be obtained by using this experimental approach, the ingoing beam angle is generally varied in equidistant x-and y-steps (θ and ω angles) around the channeling direction, a procedure which unfortunately has been given various names in the literature, e.g. "image scan" [4][5][6], "angular resolved channeling image" [7], "three-dimensional visualization of ion channeling " [8], "two-dimensional channeling pattern" [9], "angular scan image" [10], "angular yield maps" [11], "angular dependent ion channeling" [12], "angle-resolved scan" [13], "full scan maps" [14], "RBS-C maps" [15], "channeling crystal image" [16], "channeling image" [17], "angular resolved RBS data" [18], "2D ion channeling image" [19], "channeling/blocking pattern" [20], and "angular scan mapping" [21]. While such type of 2D scans are used by numerous groups, e.g.…”

“…in Refs. [5,12,14,18]. Despite the fact that 2D scans contain a wealth of information and take quite some effort to record, one of the reasons that their detailed analysis is not more widespread may be that suitable computer programs which allow quantitative analysis of 2D channeling data are not commonly available.…”