RADIATIVE RELATIVISTIC SHOCK ADIABATE

The influences of thermal radiation on the state equation of shock wav es, derived in the previous paper [L. N. Tsintsadze, Phys. Plasmas 2, 4462 (1995)], are studied and a series of relations of thermodynamic q uantities that hold for shock waves are derived. It is shown that the presence of radiation can strongly change the compressibility of the p lasma. It is well known that for polytropic gases the compressibility cannot change more than four times the initial value in the case of no nrelativistic temperatures. The numerical calculations show that there are no such restrictions, when the radiation energy exceeds the kinet ic energy of the plasma. The ultrarelativistic temperature range is al so covered in our numerical calculations. Also studied are the influen ces of the radiation on the PT and the TV diagrams. A significant modi fication due to radiation is found in every case studied. (C) 1997 Ame rican Institute of Physics.