Charge and mass distribution of products from the nuclear interaction between copper and 1 GeV 12C

Interactions of relativistic heavy ions in thick heavy element targets and some unresolved problems

“…However, one can assume that due to the concept of ®limiting fragmentation¯the experimental mass yield curve for a thin Cu target produced by 1 GeV 12 C is approximately the same for 72 GeV 40 Ar interactions in theˇrst Cu disk. Such a ®reference mass yield curve¯for 1 GeV 12 C beams [22] in copper was measured in great detail extending down to product masses of A = 7. This approximation of the mass yield curve for 72 GeV 40 Ar by the mass yield curve of 1 GeV 12 C is certainly a rather bold approximation.…”

“…• Most recently, the excitation (i. e. destruction) of target nuclei through relativistic secondary heavy (Z > 1) fragments was studied in nuclear emulsion irradiated with 72 GeV 22 Ne ions. A measure for the destruction is the number of ®black prongs¯in a single nuclear interaction ®star¯.…”

“…8. The experimental mass yield curves in theˇrst Cu disk assumed to be induced by primary 72 GeV 40 Ar ions [1,22] only and in the second Cu disk induced by the same primary beam plus secondary fragments produced in theˇrst Cu disk. Both Cu disks have been in contact.…”

“…We choose in this survey to study nuclear interactions along tracks of 72 GeV 22 Ne ions in a nuclear emulsion stack which had been irradiated many decades ago. The aim of this study was to answer the question: Is the average number 1 N b in theˇrst nuclear interaction signiˇcantly different from the average number 2 N b in the second nuclear interaction for 72 GeV 22 …”

“…As it has been mentioned already, one event class has not been considered properly: First nuclear interactions induced by a primary 22 Ne ion and resulting in zero projectile fragments with Z > 1 could not be followed into their second nuclear interaction. In these interactions only ®minimum ionizing particles¯were observed.…”