Abstract
Detailed studies are reported for the depth of penetration in aluminum of monoenergetic Na24 ions over the energy region 0.7–60 kev. Below 20 kev the median range (RM) increases linearly with energy as predicted by the Bohr–Nielsen equation. As was observed in a previous study with Cs137 ions in aluminum, the experimental distribution curves are not Gaussian in shape, but consist of a markedly asymmetric peak followed by a pronounced exponential "tail". The results of a Monte Carlo calculation show that the observed distribution curves correspond quite closely to those predicted by an isotropic elastic-scattering model.Above 20 kev, a slight deviation from the linear range–energy relationship is observed; also, the distribution curves become narrower and more symmetrical, suggesting that electronic interactions are starting to play a significant role in the stopping process. Some preliminary results for the range of accelerated ions of Rb86 and K42 in aluminum are also included for comparison. Median ranges for each of the alkali metal ions are compared with those predicted by the Bohr–Nielsen treatment.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
73 articles.
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