Traces of Landau-Zener transitions in the fusion cross section of heavy nuclei? |
| |
Authors: | Wolfgang Cassing |
| |
Institution: | GSI Darmstadt, D-6100 Darmstadt, Germany |
| |
Abstract: | Nucleus-nucleus collisions with center-of-mass energies Ec.m. close to the Coulomb barrier are investigated within the framework of time-dependent two-center shell-model states. The influence of Landau-Zener transitions on the nucleus-nucleus potential is studied in detail as a function of Ec.m. Dynamical barrier shifts and barrier fluctuations are evaluated for central collisions of 90Zr + 90Zr, 92Zr + 92Zr, 96Zr + 96Zr and their effect on the fusion probability is discussed explicitly. While for 90Zr + 90Zr no modification of the barrier penetration is found a relative enhancement (reduction) of the fusion probability up to a factor of 4 is obtained for 92Zr + 92Zr and96Zr + 96Zr. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|