dorsal/arxiv
View SchemaLarge-scale Breit-Pauli R-matrix calculations for transition probabilities of Fe V
| Authors | Sultana N. Nahar, Anil K. Pradhan |
|---|---|
| Categories | |
| ArXiv ID | physics/0001045 |
| URL | https://arxiv.org/abs/physics/0001045 |
| DOI | 10.1238/Physica.Regular.061a00675 |
Abstract
Ab initio theoretical calculations are reported for the electric (E1) dipole allowed and intercombination fine structure transitions in Fe V using the Breit-Pauli R-matrix (BPRM) method. We obtain 3865 bound fine structure levels of Fe V and $1.46 x 10^6$ oscillator strengths, Einstein A-coefficients and line strengths. In addition to the relativistic effects, the intermediate coupling calculations include extensive electron correlation effects that represent the complex configuration interaction (CI). Fe V bound levels are obtained with angular and spin symmetries $SL\pi$ and $J\pi$ of the (e + Fe VI) system such that $2S+1$ = 5,3,1, $L \leq$ 10, $J \leq 8$. The bound levels are obtained as solutions of the Breit-Pauli (e + ion) Hamiltonian for each $J\pi$, and are designated according to the `collision' channel quantum numbers. A major task has been the identification of these large number of bound fine structure levels in terms of standard spectroscopic designations. A new scheme, based on the analysis of quantum defects and channel wavefunctions, has been developed. The identification scheme aims particularly to determine the completeness of the results in terms of all possible bound levels for applications to analysis of experimental measurements and plasma modeling. An uncertainty of 10-20% for most transitions is estimated.
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"abstract": "Ab initio theoretical calculations are reported for the electric (E1) dipole\nallowed and intercombination fine structure transitions in Fe V using the\nBreit-Pauli R-matrix (BPRM) method. We obtain 3865 bound fine structure levels\nof Fe V and $1.46 x 10^6$ oscillator strengths, Einstein A-coefficients and\nline strengths. In addition to the relativistic effects, the intermediate\ncoupling calculations include extensive electron correlation effects that\nrepresent the complex configuration interaction (CI). Fe V bound levels are\nobtained with angular and spin symmetries $SL\\pi$ and $J\\pi$ of the (e + Fe VI)\nsystem such that $2S+1$ = 5,3,1, $L \\leq$ 10, $J \\leq 8$. The bound levels are\nobtained as solutions of the Breit-Pauli (e + ion) Hamiltonian for each $J\\pi$,\nand are designated according to the `collision\u0027 channel quantum numbers. A\nmajor task has been the identification of these large number of bound fine\nstructure levels in terms of standard spectroscopic designations. A new scheme,\nbased on the analysis of quantum defects and channel wavefunctions, has been\ndeveloped. The identification scheme aims particularly to determine the\ncompleteness of the results in terms of all possible bound levels for\napplications to analysis of experimental measurements and plasma modeling. An\nuncertainty of 10-20% for most transitions is estimated.",
"arxiv_id": "physics/0001045",
"authors": [
"Sultana N. Nahar",
"Anil K. Pradhan"
],
"categories": [
"physics.atom-ph",
"astro-ph",
"physics.space-ph"
],
"doi": "10.1238/Physica.Regular.061a00675",
"title": "Large-scale Breit-Pauli R-matrix calculations for transition probabilities of Fe V",
"url": "https://arxiv.org/abs/physics/0001045"
},
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