| Numéro |
J. Phys. IV France
Volume 09, Numéro PR6, June 1999
International Conference on Coincidence Spectroscopy
|
|
|---|---|---|
| Page(s) | Pr6-85 - Pr6-88 | |
| DOI | https://doi.org/10.1051/jp4:1999619 | |
International Conference on Coincidence Spectroscopy
J. Phys. IV France 09 (1999) Pr6-85-Pr6-88
DOI: 10.1051/jp4:1999619
1 Laboratoire de Spectroscopie Atomique et Ionique, Université Paris XI, 91405 Orsay, France
2 Institute of Physics, The University of St. Petersburg, St. Petersburg 198904, Russia
© EDP Sciences 1999
J. Phys. IV France 09 (1999) Pr6-85-Pr6-88
DOI: 10.1051/jp4:1999619
Photo double-ionization of helium : A new approach combining R matrix and semiclassical techniques in an hyperspherical framework
L. Malegat1, A. Kazansky2 and P. Selles11 Laboratoire de Spectroscopie Atomique et Ionique, Université Paris XI, 91405 Orsay, France
2 Institute of Physics, The University of St. Petersburg, St. Petersburg 198904, Russia
Abstract
We introduce a new method for computing photo double ionization (PDI) cross sections for two electron atoms. It is formulated in terms of the hyperspherical radius R and relies upon a combination of R matrix techniques in the inner region R≤R0 with a semi classical approximation for the R motion in the outer region. We present a first application of this method to the PDI of He within a model of reduced dimensionality where r1=r2. It demonstrates the validity of our numerical scheme and provides a first quantitative estimate of the energy domain of validity of the Wannier mechanism.
© EDP Sciences 1999