It seems that logarithmic plot can display only 4 decades (orders of magnitude) on vertical axis, despite setting limit to 6 decades (from 1e-4 to 1e2
hist.fYaxis.fTitle = `Stopping power [${stpUnit.name}]`
hist.fYaxis.fXmin = 1e-4
hist.fYaxis.fXmax = 1e+2