Proton stopping in C+C, d+C, C+Ta and d+Ta collisions at 4.2A GeV/c

Details Proton stopping in C+C, d+C, C+Ta and d+Ta collisions at 4.2A GeV/c Proton stopping in C+C, d+C, C+Ta and d+Ta collisions at 4.2A GeV/c

1998-04-30

arxiv.org/abs/nucl-ex/9804005v2

Phys.Rev.C58:2585-2587,1998

Physics

Nuclear Physics

Nuclear Experiment

9 pages REVTeX, 1 PS figure replaced, to be published in Phys.Rev.C

Scientific paper

10.1103/PhysRevC.58.2585

The shape of proton rapidity distributions is analysed in terms of their Gaussian components, and the average rapidity loss is determined in order to estimate the amount of stopping in C+C, d+C, C+Ta and d+Ta collisions at 4.2A GeV/c. Three Gaussians correspond to the nuclear transparency and describe well all peripheral and also C+C central collisions. Two-component shape is obtained in case of d+C and C+Ta central collisions. Finally one Gaussian, found in d+Ta central collisions, corresponds to the full stopping. The calculated values of the average rapidity loss support the qualitative relationship between the number of Gaussian components and the corresponding stopping power. It is also observed, in central collisions, that the average rapidity loss increases with the ratio of the number of target and the number of projectile participants.

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