It is used as a measure of absorbed dose , kinetic energy ( released ) , and kerma ( an acronym for specific energy imparted per unit mass ) . It is used as a measure of absorbed dose , kinetic energy ( released ) and kerma ( acronym for specific energy transmitted per mass unit ) . It is used as a measure for absorbed dose , specific energy ( mediated ) and kerma ( acronym for kinetic energy released per unit of mass ) .