Photodetachment of H{sup -} by a short laser pulse in crossed static electric and magnetic fields

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.023402· OSTI ID:20853086

Liangyou, Peng; Qiaoling, Wang; Starace, Anthony F ^[1]

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1. Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0111 (United States)

We present a detailed quantum mechanical treatment of the photodetachment of H{sup -} by a short laser pulse in the presence of crossed static electric and magnetic fields. An exact analytic formula is presented for the final state electron wave function (describing an electron in both static electric and magnetic fields and a short laser pulse of arbitrary intensity). In the limit of a weak laser pulse, final state electron wave packet motion is examined and related to the closed classical electron orbits in crossed static fields predicted by Peters and Delos [Phys. Rev. A 47, 3020 (1993)]. Owing to these closed orbit trajectories, we show that the detachment probability can be modulated, depending on the time delay between two laser pulses and their relative phase, thereby providing a means to partially control the photodetachment process. In the limit of a long, weak pulse (i.e., a monochromatic radiation field) our results reduce to those of others; however, for this case we analyze the photodetachment cross section numerically over a much larger range of electron kinetic energy (i.e., up to 500 cm{sup -1}) than in previous studies and relate the detailed structures both analytically and numerically to the above-mentioned, closed classical periodic orbits.

• OSTI ID: 20853086
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CROSS SECTIONS
ELECTRON DETACHMENT
ELECTRONS
HYDROGEN
HYDROGEN IONS 1 MINUS
KINETIC ENERGY
LASER RADIATION
MAGNETIC FIELDS
MONOCHROMATIC RADIATION
ORBITS
PERIODICITY
PHOTON-ATOM COLLISIONS
PULSES
QUANTUM MECHANICS
TIME DELAY
WAVE FUNCTIONS
WAVE PACKETS