RANGES OF 0.2-1.0 GEV NUCLEON HEAVY-IONS IN NUCLEAR PHOTOEMULSION/

Heavy nuclei transport in matter are studied experimentally and theore tically. Our experimental range and straggling values of 0.2 - 1.0 GeV /nucleon Ne-20, Ar-40, Fe-56, (197)AU and U-238 nuclei in BR-2 nuclear photoemulsion are presented and compared with model calculations carr ied out according to our RANGE-program and the PRAL-model (version of 1987) developed by Ziegler et al. The presented data analysis points a t the necessity to take into account Z(3)-correction in Bete-Bloch for mula when ionization losses of very heavy multicharge ions (for exampl e Au-197 and U-238) are calculated. The comparison of experimental and calculated results showed that RANGE program can correctly calculate the ranges and straggling of heavy ions. The difference between experi mental and theoretical data do not exceed 5 % in all of the cases exam ined. PRAL model describes the heavy ion ranges quite adequately, but overestimates the particle range straggling.