Novel fission studies in inverse kinematics with exotic relativistic radioactive beams at SAMURAI

他的实验性博士研究项目涉及RIBF武士装置的相对论能量下富质子不稳定核的新裂变研究。直到十年前，由于现有实验技术的限制，以及需要使用稳定的靶子来产生感兴趣的核，裂变研究大多局限于接近β稳定线的核素。随着最近快速(或加速后)放射性束流的出现，情况发生了戏剧性的变化，这使得裂变研究可以扩展到非常奇怪的原子核，以前无法进行裂变实验。这使得研究，例如，很少被探索的同位旋(或，中子与质子，N/Z，比率)对裂变的依赖。该项目中获得的N/Z值非常奇特的同位素的新裂变数据将用于关键的基准测试和现有理论裂变模型的适用性，并将它们的可预测性扩展到新的、尚未探索的裂变核区域。此外，使用逆运动学可以在确定相对论裂变碎片(比一个电荷和质量单位更好)的Z和A时获得前所未有的精度，这在传统的裂变研究中通常是不可能的，或者受到很大阻碍，因为裂变碎片的能量很低，只有1ameV。

his experimental PhD research project involves the novel fission studies of proton-rich unstable nuclei at relativistic energies in inverse kinematics at the SAMURAI setup at RIBF. Until a decade of so ago, due to the limitations of available experimental techniques and the need to use stable targets to produce nuclei of interest, the fission studies were mostly limited to nuclides close to beta-stability line. The situation changed dramatically with the recent advent of fast (or post-accelerated) radioactive beams, which allow to extend the fission studies to the very exotic nuclei, not previously accessible for fission experiments. This allows to investigate, for example, the scarcely-explored isospin (or, neutron-to-proton, N/Z, ratio) dependence of fission. The new fission data obtained in this project for isotopes with very exotic N/Z-values, will be used for a crucial benchmarking and of the applicability of existing theoretical fission models, and to extend their predictability to new, yet unexplored, regions of fissionning nuclei. Furthermore, the use of inverse kinematics allows to obtain an unprecedented precision in determination of both Z and A of relativistic fission fragments (better than one unit in charge and mass), which is usually not possible or strongly hampered in traditional fission studies, where the fission fragments are at low energy of only 1 AMeV.