Laser-assisted positron-impact ionization of atomic hydrogen in the second Born approximation

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.033425· OSTI ID:21450592

Mingyang, Zheng; Gan, Qin ^[1]; Shumin, Li ^[1]

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1. Department of Modern Physics, University of Science and Technology of China, P. O. Box 4, Hefei, Anhui 230026 (China)

We study positron-impact ionization of atomic hydrogen in the presence of a linearly polarized laser field in the second Born approximation. The state of the fast incident positron is described by the Volkov wave function and the dressed state of the ejected electron and ground-state hydrogen are treated as a first-order time-dependent perturbative wave function. We calculate the triple differential cross section in the Ehrhardt asymmetric geometry, and numerical results indicate that the second-order effects are significant. Compared with the ionization process by electrons, the influence of the projectile charge sign appears: the binary peaks are greatly enhanced for positrons in the second Born approximation.

• OSTI ID: 21450592
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
APPROXIMATIONS
ASYMMETRY
ATOM COLLISIONS
BORN APPROXIMATION
CALCULATION METHODS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FUNCTIONS
HYDROGEN
IONIZATION
LASER RADIATION
LEPTONS
MATTER
NONMETALS
PHOTON COLLISIONS
PHOTON-ATOM COLLISIONS
POSITRONS
RADIATIONS
TIME DEPENDENCE
WAVE FUNCTIONS