Many-body-theory study of lithium photoionization
Abstract
A detailed theoretical calculation is carried out for the photoionization of lithium at low energies within the framework of Brueckner-Goldstone perturbational approach. In this calculation extensive use is made of the recently developed multiple-basis-set technique. Through this technique all second-order perturbation terms, plus a number of important classes of terms to infinite order, have been taken into account. Analysis of the results enables one to resolve the discrepancies between two previous works on this subject. The detailed calculation also serves as a test on the convergence of the many-body perturbation-expansion approach.
- Publication:
-
Physical Review A
- Pub Date:
- January 1975
- DOI:
- 10.1103/PhysRevA.11.191
- Bibcode:
- 1975PhRvA..11..191C
- Keywords:
-
- Lithium;
- Many Body Problem;
- Perturbation Theory;
- Photoionization;
- S Matrix Theory;
- Feynman Diagrams;
- Hartree Approximation;
- Ionization Cross Sections;
- Polarization (Spin Alignment);
- Wave Functions;
- Atomic and Molecular Physics