1993
DOI: 10.1103/physrevlett.70.2375
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Calculation of Langmuir states in doubly excited helium

Abstract: We have identified a class of high-lying doubly excited resonances in helium which are directly linked to a classical orbit first proposed by Langmuir for the quantization of helium. The projection of the wave function onto three mutually orthogonal planes is shown to trace the Langmuir orbit. This class of resonances forms the top of the intrashell manifold, and are long-lived compared to other members of the same manifold. In the limit Z-* «>, the wave function traces the modified, asymmetric Langmuir orbit … Show more

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Cited by 28 publications
(9 citation statements)
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“…[23], leads again to a molecular curve, which is composed of two elliptic quasilinear curves, when the minimum distance between electron and the nucleus is negligible. The curves for the other electrons are symmetrical, in agreement to (18)- (21). These curves, which result from (22), are represented in Fig.…”
Section: Double Bond (N B = 4)supporting
confidence: 72%
“…[23], leads again to a molecular curve, which is composed of two elliptic quasilinear curves, when the minimum distance between electron and the nucleus is negligible. The curves for the other electrons are symmetrical, in agreement to (18)- (21). These curves, which result from (22), are represented in Fig.…”
Section: Double Bond (N B = 4)supporting
confidence: 72%
“…In the physical literature, the correlated periodic motion of electrons in the helium atom is currently the subject of intensive (mostly numerical) studies (see, e.g., [39] and the references therein). This is because such types of motion under the condition of their classical (linear) stability generate doubly excited (with principal quantum numbers n ∼ 10 and higher [40]) long-lived states of the quantum system even though their energy is higher than the energy of the one-electron ionization of the atom [41]. Such states can be observed in experiments on the multiphoton laser excitation of helium-like atoms [42], where they appear as narrow resonances whose energy is extremely close to the energy of the doubly ionized atom.…”
Section: Semiclassical Quantization Of Stable Configurations Of Electmentioning
confidence: 98%
“…В настоящее время в физической литературе периодические коррелированные движения электронов в атоме гелия являются предметом интенсивного (в основном численного) исследо-вания (см., например, [39] и цитируемую там литературу). Это связано с тем, что такие типы движения при условии их классической (линейной) стабильности порож-дают дважды возбужденные (с главными квантовыми числами n ∼ 10 и выше [40]) долгоживущие состояния квантовой системы несмотря на то, что их энергия выше, чем энергия одноэлектронной ионизации атома [41]. Такие состояния можно наблю-дать в экспериментах по мультифотонному лазерному возбуждению гелиеподобных атомов [42], где они проявляются в виде узких резонансов, энергия которых чрез-вычайно близка к энергии двойной ионизации атома.…”
Section: боровская фазовая траектория с комплексным росткомunclassified