Ho target fragmentation induced by intermediate energy 12C and 16O

In a program begun previously, the authors have measured the target fragment yield distributions and kinematic properties for the interaction of 17-2100 MeV/nucleon light heavy ions (C, O, Ne) with 165Ho. They show the isobaric yield distributions deduced from measured nuclidic formation cross sections for the interaction of various intermediate energy 12C and 16O ions with 165Ho. Due to uncertainties in the monitor cross sections used for beam intensity determination for the 384 MeV 12C and 1536 MeV 16O experiments the absolute cross sections in these experiments are uncertain to approximately +/-30%. (The authors are currently remeasuring these monitor cross sections and hope to lessen these uncertainties). Nonetheless, it would appear that as the projectile energy is increased beyond 20 MeV/nucleon, the fission cross section (represented by the yield of products with 70 less than or equal to A less than or equal to 100) decreases and fragmentation (spallation) and incomplete fusion processes increase