Inelasticity for hadron-carbon nucleus collisions from emulsion chamber

The inelasticity of hadron-carbon collisions for energies exceeding 100 TeV is estimated from the carbon-emulsion chamber data at Pamirs to be (K-c) = 0.65 +/- 0.08. When combined with data on hadron-lead collisions taken in the same energy range it results in the K similar to A(0.086) mass number d ependence of inelasticity. The evaluated partial inelasticity for secondary (nu > 1) interactions, K-nu>1 similar or equal to 0.2, suggests that most of the energy is lost in the first interaction.