Observed photodetachment in parallel electric and magnetic fields

Yukich, John N.; Kramer, Tobias; Bracher, Christian

doi:10.1103/physreva.68.033412

Cited by 27 publications

(18 citation statements)

References 43 publications

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“…Such threshold laws are independent of the specifics of the reaction or reaction products [1,2], and can therefore be equally applicable to, for example, fragmentation at the molecular, atomic, or even subatomic level. In addition, observed agreement or departure from accepted threshold laws can yield insight into the dynamics of the process under study, be a sensitive probe of the effects of external electric [3,4] and/or magnetic fields [5], reveal details of the binding potential [6], or yield insight into the classical-quantum mechanical correspondence of physical processes [7].…”

mentioning

confidence: 99%

Inner-Shell Photodetachment Thresholds: Unexpected Long-Range Validity of the Wigner Law

et al. 2005

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Threshold behavior in inner-shell photodetachment is studied for the first time, specifically with 2-, 3-, or 4-electron emission from He- and S-. The threshold shapes are surprisingly consistent with the Wigner threshold law in all cases, despite large PCI effects observed in He-. In S-, the s-wave law is observed to agree with the data over an unprecedented range, more than an order of magnitude greater than predictions, and allows for the observation of the d-wave component. The measurements also demonstrate a means for obtaining precise core-excitation energies of free atoms.

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confidence: 99%

Inner-Shell Photodetachment Thresholds: Unexpected Long-Range Validity of the Wigner Law

et al. 2005

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“…A recent experiment is compared to the theory sketched here in Ref. [56]. As shown in Figure 5 the agreement is excellent and underlines the validity of the quantum source approach.…”

Section: Application: Photodetachmentmentioning

confidence: 64%

Propagation in Crossed Electric and Magnetic Fields: The Quantum Source Approach

Kramer

Bracher

2004

Symmetries in Science XI

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Abstract. The propagation of electrons in static and uniform electromagnetic fields is a standard topic of classical electrodynamics. The Hamilton function is given by a quadratic polynomial in the positions and momenta. The corresponding quantummechanical problem has been analyzed in great detail and the eigenfunctions and time evolution operators are well-known. Surprisingly, the energy-dependent counterpart of the time-evolution operator, the Green function, is not easily accessible. However in many situations one is interested in the evolution of a system that started with emitted particles that carry a specific energy. In the following we present a suitable approach to study this type of matter waves arising from a localized region in space. Two applications are discussed, the photodetachment current in external fields and the quantum Hall effect in a fermionic electron gas.

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“…Applying relation (A.3) in the Appendix, we find that only the first sum in Eq. (20), corresponding to the open scattering channels, contributes to the current:…”

Section: Quantum Charge Densities and Currentsmentioning

confidence: 99%

“…This intuitive trajectorybased picture is known as closed orbit theory [12,13]. The detachment cross section in combined electric and magnetic fields was addressed in numerous theoretical papers [14][15][16][17][18][19], and explored in at least one experiment involving parallel fields [20].…”

Section: Introductionmentioning

confidence: 99%

Propagation of charged particle waves in a uniform magnetic field

Bracher¹,

Gonzalez²

2012

Phys. Rev. A

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This paper considers the probability density and current distributions generated by a point-like, isotropic source of monoenergetic charges embedded into a uniform magnetic field environment. Electron sources of this kind have been realized in recent photodetachment microscopy experiments. Unlike the total photocurrent cross section, which is largely understood, the spatial profiles of charge and current emitted by the source display an unexpected hierarchy of complex patterns, even though the distributions, apart from scaling, depend only on a single physical parameter. We examine the electron dynamics both by solving the quantum problem, i. e., finding the energy Green function, and from a semiclassical perspective based on the simple cyclotron orbits followed by the electron. Simulations suggest that the semiclassical method, which involves here interference between an infinite set of paths, faithfully reproduces the features observed in the quantum solution, even in extreme circumstances, and lends itself to an interpretation of some (though not all) of the rich structure exhibited in this simple problem.Comment: 39 pages, 16 figure

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Observed photodetachment in parallel electric and magnetic fields

Cited by 27 publications

References 43 publications

Inner-Shell Photodetachment Thresholds: Unexpected Long-Range Validity of the Wigner Law

Inner-Shell Photodetachment Thresholds: Unexpected Long-Range Validity of the Wigner Law

Propagation in Crossed Electric and Magnetic Fields: The Quantum Source Approach

Propagation of charged particle waves in a uniform magnetic field

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