The evolution of 4d photoabsorption in Sb with increasing ionization
| Autor: | Gerry O'Sullivan, Rebekah D’Arcy, Cormac McGuinness, Eugene T. Kennedy, John Costello, Jean-Paul Mosnier |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 33:1383-1401 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/33/7/307 |
| Popis: | The photoabsorption spectra of Sb+ , Sb2+ , Sb3+ and Sb4+ have been obtained in the XUV spectral region with the dual laser-produced plasma (DLP) technique. Photoexcitation from the 4d subshell is the dominant process in the 30-100 eV energy region. In Sb+ , for photon energies between 30 and 50 eV, discrete structure corresponding to 4d n p, n 1 f (n 5,n 1 4) transitions is obtained, while above 50 eV the spectrum is dominated by an intense 4d f resonance. Apart from the 4d 5p transitions the features are very weak. The 4d f resonance is still observed in Sb2+ as the dominant feature in the spectrum, but in Sb3+ and Sb4+ there is significant transfer of oscillator strength from the continuum to the discrete spectra, in particular to the 4d n f transitions. This behaviour mirrors the effects of contraction of the 4f wavefunction, which is seen to be more gradual here than in elements with Z >54. Multiconfiguration Hartree-Fock and time-dependent local density approximation calculations successfully reproduce this behaviour. |
| Databáze: | OpenAIRE |
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