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Author Foerre, Morten ♦ Nepstad, Raymond ♦ Selstoe, Soelve
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ATOMIC AND MOLECULAR PHYSICS ♦ APPROXIMATIONS ♦ ATOMS ♦ COMPARATIVE EVALUATIONS ♦ DIFFERENTIAL CROSS SECTIONS ♦ EV RANGE ♦ HELIUM ♦ IONIZATION ♦ NEON ♦ PHOTON-ATOM COLLISIONS ♦ PHOTONS ♦ TOTAL CROSS SECTIONS ♦ ATOM COLLISIONS ♦ BOSONS ♦ CALCULATION METHODS ♦ COLLISIONS ♦ CROSS SECTIONS ♦ ELEMENTARY PARTICLES ♦ ELEMENTS ♦ ENERGY RANGE ♦ EVALUATION ♦ FLUIDS ♦ GASES ♦ MASSLESS PARTICLES ♦ NONMETALS ♦ PHOTON COLLISIONS ♦ RARE GASES
Abstract We develop an approximate model for the process of direct (nonsequential) two-photon double ionization of atoms. Employing the model, we calculate (generalized) total cross sections as well as energy-resolved differential cross sections of helium for photon energies ranging from 39 to 54 eV. A comparison with results of ab initio calculations reveals that the agreement is at a quantitative level. We thus demonstrate that this complex ionization process can be described by the simple model, providing insight into the underlying physical mechanism. Finally, we use the model to calculate generalized cross sections for the two-photon double ionization of neon in the nonsequential regime.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-10-15
Publisher Place United States
Journal Physical Review Letters
Volume Number 105
Issue Number 16


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