Edwin E. Quashie edited Figure_ref_fig_log_stopping_power_shows__.tex  over 8 years ago

Commit id: 8b31f3a67459fb19f367e28dee3d0e75677b7d11

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Figure \ref{fig:log_stopping_power} shows the log scale of Figure \ref{fig:stopping_power}. At projectile velocities, $v < 0.1 ~\mathrm{a.u.}$ there is a deviation from linearity of the $S_\text{e}$ for the channeling case. We attribute this observation to the crystalline structure of copper. The error bars (channeling case) are smaller than the calculated value (of point size); for example at $v = 0.08 ~\mathrm{a.u.}$ the value of $S_\text{e}$ is $0.00995124~E_\text{h}/a_0$ but our fitting procedure produces the error limit of $\pm 1.105 \times 10^{-6} ~E_\mathrm{h}/a_0$ and therefore the error bars are practically invisible when plotted in figure \ref{fig:log_stopping_power}. Throught the studied velocity regime the limit of the error bar lies between $10^{-7}$ to $10^{-4}$ for the channeling case. At higher velocities our $S_\text{e}$ (channeling case)  results underestimates the experimental findings owing to lack of core electron effects which are not included in our calculations. The importance of core electrons has been discussed earlier by Scheife {\em et al}\cite{Schleife_2015}.% al}\cite{Schleife_2015}. However, the off-channeling case gives a much reasonable results compared with experiment.%