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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 6 — Mar. 15, 2007
  • pp: 585–587

Laser-assisted positron-impact ionization of atomic hydrogen

Juan Pan, Shu-Min Li, and Jamal Berakdar  »View Author Affiliations


Optics Letters, Vol. 32, Issue 6, pp. 585-587 (2007)
http://dx.doi.org/10.1364/OL.32.000585


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Abstract

We study the ionization of atomic hydrogen by a fast positron in the presence of an external linearly polarized laser field. We concentrate on the limit of a small momentum transfer and describe the fast positron’s continuum states by Volkov wave functions. The ejected electron is described by a Coulomb–Volkov wave function. We are limited to small laser intensities such that the dressed state of the target is treatable within the time-dependent perturbation theory, even though the laser intensity is still quite high by laboratory standards. Numerical results for the triply differential cross sections and their dependencies on laser-field parameters are discussed and compared with the results of laser-assisted ionization by electron impact.

© 2007 Optical Society of America

OCIS Codes
(020.2070) Atomic and molecular physics : Effects of collisions
(020.4180) Atomic and molecular physics : Multiphoton processes
(260.3230) Physical optics : Ionization
(350.4990) Other areas of optics : Particles

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: September 19, 2006
Revised Manuscript: November 29, 2006
Manuscript Accepted: November 29, 2006
Published: February 15, 2007

Citation
Juan Pan, Shu-Min Li, and Jamal Berakdar, "Laser-assisted positron-impact ionization of atomic hydrogen," Opt. Lett. 32, 585-587 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-6-585

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