mass stopping power

The mass stopping power then depends only very little on the density of the material.

One therefore often divides the force by the density of the material to obtain the mass stopping power which in the international system is expressed in m/s but is usually found in units like MeV/(mg/cm) or similar.

The effect of the radiation is described by the LET (which is here taken as synonymous with stopping power), typically expressed in units of MeV cm2/mg of material, the units used for mass stopping power (The material in question is usually Si for MOS devices).