Nondipole and Quantum Confinement Effects in Atomic Spectra

该项目旨在促进对原子光电离中非偶极子偶极子(E1)-四极子（E2）干涉效应的理解，促进对量子受限结构的理解，并促进北阿拉巴马大学的研究与教育的整合。具体来说：了解发生和/或nf轨道坍塌的原子（基本上是所有的跃迁原子和稀土原子）中巨大的四极自电离共振区域E1-E2效应的强度。建立四极里德堡结构与巨大的四极自电离共振相互作用的行为趋势，迄今为止对这些共振知之甚少或一无所知。了解在大范诺剖面参数q值的原子中偶极自电离极小值内的E1-E2效应，如在Tl中，从而可能导致远离共振最大值的强E1-E2效应。建立不完全近程约束筛选条件下约束原子系统的量子缺陷理论。由于里德伯态和腔相关共振之间的交叉而产生的新的独特的通道间现象有望被揭示。研究不完全带电量子约束条件下原子的光谱学基础。研究将采用Hartree-Fock近似和多体随机相位交换近似（RPAE）。UNA本科生将积极参与研究。

This project aims at advancing the understanding of nondipole dipole (E1)-quadrupole (E2) interference effects in atomic photoionization, at advancing the understanding of quantum confined structures, and at fostering integration of research and education at the University of North Alabama. Specifically: To learn about the strength of E1-E2 effects in regions of gigantic quadrupole autoionizing resonances in atoms developing nd and/or nf orbital collapse (essentially all transition and rare-earth atoms). To establish trends in the behavior of quadrupole Rydberg structures interacting with gigantic quadrupole autoionizing resonances of which little or nothing is known to date. To learn about E1-E2 effects within dipole autoionizing minima in atoms with large Fano profile parameter q. nance maxima, as in Tl, thus possibly resulting in strong E1-E2 effects far off the resonance maxima. To develop a quantum defect theory of confined atomic systems under conditions of incomplete short-range confining screening. New unique classes of interchannel phenomena arising due to crossings between Rydberg states and cavity related resonances are expected to be revealed. To work out the foundations of spectroscopy of atoms A trapped under conditions of incomplete charged quantum confinement. Hartree-Fock approximations and the many-body random phase approximation with exchange (RPAE) will be employed in the study. UNA undergraduate students will actively be engage in research.