An expression ior the transition matrix element between excited states is given in terms of the solutions to the time-dependent Ha-tree-Fock eigenvalue ditierendal equations. Some dipc4e oscillator saengths and transirioo moments are evaluated for members of the helium isoelectronic sequence.
Hartree-fock transition theory and multi-electron transitions in atoms and molecules
β Scribed by C.A. Nicolaides
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 641 KB
- Volume
- 101
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
W&ieIectron tnnsitions cau be induced via electron correlation. However, in many cases, such transItIons can atso be understood in terms of orbitaI relaxation and their probabiIity can be estimated from theAWe&on Hartree-Fock theory of transitions. Thus, even when complex aIgorIthms, like the RPA, fait. heuristic as well as semiquantitative predictions on the dynamics of transitions can often be made based on true Hartree-Fock functions ordy. The present point of view is supported by numerical results for a variety of cases, including the first prediction for He-ls2s2p 4Po double photoionization into the 4P channel.
' Here. it should be pointed out that, even for multiply excited states in neutral or negative ions, it has been shown 128.29, 321 that HF or hfCHF theory is applicable, but good congergence is difficult to achieve.
π SIMILAR VOLUMES
We present spin-polarized Hartree-Fock-Slater calculations performed with the highly accurate numerical finite element method for the atoms N and 0 and the diatomic radical OH as examples.
In the present imestigation u e present all-electron ab initio Hartree-Fock (HF) calculations of the three low-lying electronic sr.nes '2. 'X+\_ and '11 resulting from rhe interaction between an yttrium atom in the 'D4d'5s2 term and a p&sdium atcJm in the 'S Id" term. The basis sets used xxers of do
Within the usual assumptions associated with sudden-approximation analyses of photoelectron spectm. it is shown that unrelaxed subshell cross sections calculated on the basis of unit overlap between initial-and final-state-passive electrons implicitly include the effects of both one-electron and mul