ENERGY-LOSS OF MEV HEAVY-IONS IN CARBON

A novel technique, using secondary forward recoil ions generated in th in standard targets by energetic very heavy primary ion beam, has been employed to measure energy loss of several ion species (Z(1) = 8 to 2 9) covering energies between 0.1 and 1.0 MeV/u. Energy variation was s imply affected by changing the detector angle between 35 degrees to 70 degrees, avoiding the dominant elastic scattering of the primary beam . A twin detector permitted simultaneous measurement of both unabsorbe d and absorbed spectra. The experimental data on stopping power are co mpared with evaluated values using LSS theory and TRIM. A better under standing of the validity of available theoretical evaluations has beco me possible, with a need for higher precision in experimental data in some cases.