deletions | additions       diff --git a/figures/plot_force4/caption.tex b/figures/plot_force4/caption.tex  index 6aaa1be..bf50899 100644  --- a/figures/plot_force4/caption.tex  +++ b/figures/plot_force4/caption.tex 
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\label{fig:force_on_neighbor} (color online). Radial force exerted on a $\mathrm{Cu}$ atom as a function of parallel distance to projectile at different projectile velocities $v$.   The force is \emph{negative} radial, which means that adiabatically (red curve) the proton atracts attracts  the neighbour $\mathrm{Cu}$ atom, but as the electron wake develops at higher velocities ($v = 1.5$ and $2.5~\mathrm{a.u.}$ the force becomes repulsive after passing. For visualization purposes the non-adiabatic curves have been shifted vertically upwards.%%