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Electronic and nuclear stopping cross sections in carbon for light mass ions of 4.5 to 46 keV energy
Author(s) -
Höberg G.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220480243
Subject(s) - atomic physics , scattering , ion , physics , cross section (physics) , foil method , stopping power , saturation (graph theory) , nuclear physics , energy (signal processing) , materials science , optics , mathematics , quantum mechanics , combinatorics , composite material
The mean stopping cross section, S , of thin carbon foils has been determined for light mass particles with 3 ≦ Z 1 , ≦ 18. The dependence of stopping cross section on foil thickness and scattering angle is reported. The energy of the incident ions ranged from 4.5 to 46 ke V. The electronic, S e , and nuclear, S n , stopping cross sections were deduced from the experimentally determined mean stopping cross section at zero output angle, \documentclass{article}\pagestyle{empty}\begin{document}$ \overline {S(0)} \, = \,S_e \, + \,\overline {S_n \,(0)} $\end{document} , by putting \documentclass{article}\pagestyle{empty}\begin{document}$ S_e \, = \,\mathop {\lim}\limits_{t \to 0} \,\overline {S(0,\,t)} $\end{document} where t is the foil thickness. The reported values of S e , are in t → 0 good agreement with previously published results. The mean nuclear stopping cross section in the forward direction is found to reach a saturation value in foils thicker than about 8 μg/cm 2 . The increase of S with scattering angle is parabolic at small scattering angles and linear at large scattering angles.