Published November 5, 2012 | Version v1
Journal article Metadata-only

Closure approximation in the theory of two-photon double ionization of atoms

Creators

  • 1. Joint Institute for Nuclear Research, Dubna, Moscow region, 141980 (Russian Federation)
  • 2. Centre Lasers Intenses et Applications, Université Bordeaux I-CNRS-CEA, 33405 Talence Cedex (France)
  • 3. Institute of Nuclear Physics, Moscow State University, Moscow 119991 (Russian Federation)
  • 4. Institute of Condensed Matter and Nanosciences, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium)

Description

We consider two-photon double ionization of helium with 100, 200, and 400 eV excess energy. We focus on the case of ultrashort pulses and develop an approach to calculate the two-photon transition matrix elements within the lowest order of the time-dependent perturbation theory. It is shown, that in the subfemtosecond regime the intermediate Green's function can be successfully evaluated by means of the closure approximation.

Availability note (English)

Available from http://dx.doi.org/10.1088/1742-6596/388/3/032004

Additional details

Identifiers

DOI
10.1088/1742-6596/388/3/032004;

Publishing Information

Journal Title
Journal of Physics. Conference Series (Online)
Journal Volume
388
Journal Issue
3
Journal Page Range
[1 p.]
ISSN
1742-6596

Conference

Title
27. international conference on photonic, electronic and atomic collisions
Acronym
ICPEAC 2011
Dates
27 Jul - 2 Aug 2011
Place
Belfast, Northern Ireland (United Kingdom)

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44033241
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
APPROXIMATIONS; ATOMS; EV RANGE; GREEN FUNCTION; HELIUM; IONIZATION; MATRIX ELEMENTS; PERTURBATION THEORY; PHOTON-ATOM COLLISIONS; PHOTONS; PULSES; S MATRIX; TIME DEPENDENCE
Descriptors DEC
ATOM COLLISIONS; BOSONS; CALCULATION METHODS; COLLISIONS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FLUIDS; FUNCTIONS; GASES; MASSLESS PARTICLES; MATRICES; NONMETALS; PHOTON COLLISIONS; RARE GASES