Rydberg electron-atom scattering in forbidden regions of negative kinetic energy

Rydberg electron-atom scattering in forbidden regions of negative kinetic energy
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负动能禁区内的里德伯电子原子散射

DOI:
10.1088/1361-6455/ab7526
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发表时间:
2020
期刊:
Molecular and Optical Physics
影响因子:
--
通讯作者:
Côté, Robin
Côté, Robin
中科院分区:
--
文献类型:
--
作者:
Stanojevic, Jovica;Côté, Robin

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位于其经典禁区内的基态原子(散射体)对里德伯电子的散射可以被视为具有负入射能量的电子-原子散射。我们提出在里德伯电子与基态原子相互作用产生的长程分子势的背景下处理这种不寻常的散射情况。我们描述了一种导致负入射能量的散射长度和相移的适当等价物的处理,当里德伯原子被多个散射体穿透并且里德伯电子在经典允许和禁止区域中的原子之间来回散射时,这种处理变得有利。我们将这种方法应用于 Cs 和 Rb 样品,并找到了它们 3 S 1 态的类似共振特征的证据。
Scattering of a Rydberg electron by ground-state atoms (scatterers) located in its classically forbidden region can be viewed as electron-atom scattering with negative incident energy. We propose a treatment of this unusual case of scattering in the context of long-range molecular potentials arising from the interaction of a Rydberg electron with ground state atoms. We describe a treatment leading to proper equivalents of scattering lengths and phase shifts for negative incident energies, which becomes advantageous when a Rydberg atom is penetrated by more than one scatterer and the Rydberg electron scatters back and forth between the atoms in the classically allowed and forbidden regions. We apply this approach to Cs and Rb samples, and find evidence for a resonance-like feature for their 3 S 1 states.
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