The channeling characteristics of protons and helium ions in a di-atomic single crystal (CaF 2 ) have been studied in the energy range 0.67 to 4.00 MeV. The steering properties of each sublattice have been measured independently by detecting Rutherford back-scattered ions and gamma-rays from the nuclear reaction F 19 (p,αγ)O 16 . The critical angle for channeling (ψ 1/2 ) and the minimum yield (χ min ) have been measured and compared to theory. The value of ψ 1/2 for axial channeling has a functional dependence which agrees well with calculations based on the average potential along the row. The measured critical angles are, however, lower in absolute magnitude than calculated.
No takes yet. Share an insight, caveat, or question.
Ragnar Hellborg (1971) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: