The PbPb collision

摘要: Abstract The reaction 208Pb on was studied at bombarding energies of 7.0 and 7.57 MeV/u. One-particle inclusive measurements using a large-area position-sensitive ionisation chamber delivered the kinetic energy, charge scattering angle products. A precise calibration stopping power for very heavy ions in detector gas performed. measured Wilczynski diagrams show, increasing loss an increase mean angle. It is attributed to dominance repulsive Coulomb forces with respect attractive nuclear forces. element distribution 238U 7.5 MeV/u also compared PbPb UU reactions. Fission probabilities are derived as function total energy loss. most striking result seen σz2 versus TKEL correlation: average rate per nucleon exchange abnormally large. shown that this behaviour associated double magic closed shell character colliding nuclei. Nuclear structure information extracted through simple parametrisation.