Evolution of Nucleus-Nucleus Collision Mechanisms from the Barrier to Beyond the Fermi Energy

M. Fatyga; K. Kwiatkowski; V. E. Viola; C. B. Chitwood; D. J. Fields; C. K. Gelbke; W. G. Lynch; J. Pochodzalla; M. B. Tsang; M. Blann

doi:10.1103/PhysRevLett.55.1376

Evolution of Nucleus-Nucleus Collision Mechanisms from the Barrier to Beyond the Fermi Energy

M. Fatyga, K. Kwiatkowski, V. E. Viola, C. B. Chitwood, D. J. Fields, C. K. Gelbke, W. G. Lynch, J. Pochodzalla, M. B. Tsang, and M. Blann

Phys. Rev. Lett. 55, 1376 – Published 23 September 1985

Abstract

Systematic measurements of linear-momentum-transfer distributions have been performed for ${}^{6}{Li}$ -, ${}^{12}C$ -, and ${}^{14}N$ -induced reactions on ${}^{238}U$ at energies up to $\frac{E}{A} = 45$ MeV. The data establish a limitation in linear momentum transfer at 200 MeV/c per projectile nucleon, which occurs near a beam energy of $\frac{E}{A} \approx 35$ MeV. This limitation is interpreted in terms of precompound particle emission, and calculations based on this concept reproduce the global energy dependence of the data.