deletions | additions       diff --git a/figures/force_xyz_dxn/caption.tex b/figures/force_xyz_dxn/caption.tex  index 08edd99..cacb012 100644  --- a/figures/force_xyz_dxn/caption.tex  +++ b/figures/force_xyz_dxn/caption.tex 
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Proton in Copper: Force on proton moving with $v = 1.8 ~\mathrm{a.u.}$ as a function of traveled distance.   Where red, black and blue lines denotes $x$, $y$ and $z$ directions respectively along the [100] channeling trajectory.   Note that the force in the direction of the velocity (solid green) does not average to zero, the average (negative) value agrees with the stopping power calculated from the energy increase (Fig.~).   Note that there is transient effect at first ($\lesssim 5~a_0$), then the projectile reenters in the periodic supercell at $\gtrsim 20.46~a_0$. ($\gtrsim 20.46~a_0$).