Ni, and Au+ Au collisions at 1. 0 A GeV. The mass dependence is strong, close to A 2. The angular distributions are nonisotropic in the center-of-mass system. Introducing rescattering seems to explain this effect to a large extent.
Abstract
Subthreshold K+ production cross sections have been measured in symmetric Ne+ NaF, Ni+ Ni, and Au+ Au collisions at 1. 0 A GeV. The mass dependence is strong, close to A 2. The angular distributions are nonisotropic in the center-of-mass system. Introducing rescattering seems to explain this effect to a large extent.