INVESTIGATION OF POSSIBLE APPLICATIONS OF CHERENKOV TECHNIQUE TO MEASURE AVERAGE ENERGY OF BEAMS OF RELATIVISTIC AU-197(79) NUCLEI IN ENERGY-RANGE 0.64-0.99 GEV U/

A possibility of using the Cherenkov technique to measure the average energy of collimated relativistic nuclear Au-79 beams is investigated in the article for specific beam-radiator interaction (strong decelera tion, fragmentation) produces a considerable effect of the spreading o f the Cherenkov one. Two Cherenkov methods - achromatic (E, alpha) and combined (''combi'')- were employed for this purpose. At an energy ab out 1 GeV/u the accuracy of measurement by the ''combi'' method was +/ -1.4MeV/u. The accuracy of measurement by the (E,alpha) method was +/- 0.9MeV/u at the energy E(Au) approximate to 640MeV/u. These results tu rned out to be in good agreement with initial E(Au)(0) data from the S IS accelerator with allowances made for energy losses over the beam li ne (the maximum discrepancy was less than or equal to 0.4%). With all the set of these data, the direction condition was for the first time checked for VChR from heavy nuclei. It is shown to be fulfilled to an accuracy above +/-5' in the angle range 27 degrees < Theta(Ch) < 38.5 degrees.