论文标题
光环核的β衰变
Beta decay of halo nuclei
论文作者
论文摘要
β衰减是对核结构的公认且有效的探测，也为光环核提供了重要信息。近二线核的详细衰减研究具有挑战性，但由于过去几十年来同位素生产和检测能力的技术进步，现在是可行的。光环结构可以改变衰减过程的动力学，最明显的是，当衰变直接进入连续体状态时，似乎在β延迟的deuteron发射中似乎是这种情况，直到现在，直到现在才观察到Halo nuclei $^6 $ HE和$^{11} $ LI。在光环状态中，明显的聚类也留下了衰减模式的烙印，尽管同胞对称性仍然很重要。在某些情况下，也已经建立了光环状态的同类类似物状态。可以预期，删除β降低的粒子发射通道会主导较重的光环核的衰变，即使不是在分支比方面，就beta强度而言。剩下的挑战是找到实验和理论工具来研究大多数中子滴灌核看起来的多中子最终状态。
Beta decay is a well-established and efficient probe of nuclear structure and provides important information also for halo nuclei. Detailed decay studies of near-dripline nuclei are challenging, but are now feasible due to the technical progress during the last decades in isotope production as well as detection capabilities. The halo structure can change the dynamics of the decay process, most noticably when decays proceed directly to continuum states as seems to be the case in beta-delayed deuteron emission, a process only observed until now for the halo nuclei $^6$He and $^{11}$Li. The pronounced clustering in halo states also leaves an imprint on the decay patterns, although the isospin symmetry remains important; in several cases the isobaric analogue states of halo states have also been established. Beta-delayed particle emission channels can be expected to dominate the decays of heavier halo nuclei, if not in terms of branching ratio than certainly in terms of beta strength. A remaining challenge is to find experimental as well as theoretical tools to study the multi-neutron final states that appear for most neutron dripline nuclei.
