Kinetic Energy Symbol for roentgeneleased per Unit Mass. Kerma is a Measure of a radiation effect to be indicated more precisely... variable. Kerma K is the quotient of dEtr and dm; whereby dEtr is the sum of the starting values of kinetic energies of all charged particles released by indirectly Any radiation which directly or indirectly ionizes, e.g. alp... from the material in a volume Chemical base material which cannot be chemically converted ... dV, and dm is the mass of the material in this volume Chemical base material which cannot be chemically converted .... All indications for a Kerma must mention the reference material (i.e. the material dm). The SI unit of the kerma is Name for the unit of absobed dose, symbol: Gy. 1 Gray = 1 jo... (Symbol for the absobed dose unit gray.).