INFN-Laboratori Nazionali del Sud and Sezione di Catania, Catania, Italy.
Phys Rev Lett. 2010 Jul 9;105(2):022701. doi: 10.1103/PhysRevLett.105.022701. Epub 2010 Jul 6.
Collisions induced by (9,10,11)Be on a 64Zn target at the same c.m. energy were studied. For the first time, strong effects of the 11Be halo structure on elastic-scattering and reaction mechanisms at energies near the Coulomb barrier are evidenced experimentally. The elastic-scattering cross section of the 11Be halo nucleus shows unusual behavior in the Coulomb-nuclear interference peak angular region. The extracted total-reaction cross section for the 11Be collision is more than double the ones measured in the collisions induced by (9,10)Be. It is shown that such a strong enhancement of the total-reaction cross section with 11Be is due to transfer and breakup processes.
在相同的质心系能量下，用 (9,10,11)Be 对 64Zn 靶进行了碰撞研究。首次从实验上证实了 11Be 晕核结构对库仑势垒附近能量的弹性散射和反应机制的强烈影响。11Be 晕核的弹性散射截面在库仑-核干涉峰角区域表现出异常行为。提取的 11Be 碰撞总反应截面是由 (9,10)Be 碰撞测量得到的总反应截面的两倍多。结果表明，11Be 总反应截面的这种强烈增强归因于转移和碎裂过程。
