Physics_EnergyLoss.md

@@ -20,8 +20,6 @@ Shell correction are discussed by Bichsel 1992 in a more modern approach for hea
 
 Barkas correction to the Bethe formula also describes differences between positive and negative projectiles. 
 
-Heavy particles Z>56 require extra work, e.g.  ??? 
-
 There is an ICRU Update document from 2014: [newstar.pdf](uploads/96cdd093e48b84427fc78d0630877434/newstar.pdf)