Variational Calculation of the Doubly-Excited States Nsnp of He-Like Ions via the Modified Atomic Orbitals Theory

Diallo, Aly; Sakho, I.; Badiane, Jean Kouhissoré; Ba, Mamadou Diouldé; Tine, Modou

doi:10.4236/jmp.2021.122011

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…There are not too many direct measurements of the resonance positions for Z > 2 systems. The resonance positions for High-Z ions are determined mostly from theoretical calculations [8,9]. Calculations of the characteristics of double excited resonances in helium like have been carried out by various methods using different approaches.…”

Section: Introductionmentioning

confidence: 99%

Multi-channel Decay Partial Widths of 1,3L° Autoionizing Levels of O6+ Below N=5 Threshold

Ndiaye¹,

Ba²,

Faye³

et al. 2021

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The motivation of the diagonalization method is to take into consideration the coupling between closed and opened channels in term of perturbation theory and to neglect the indirect coupling as well but also the autoionisation states through the opened channels. This procedure leads to a relatively simple mathematical problem consisting of solving a system of linear algebraic equations instead of a system of coupled differential equations or integro-differential equations. In this paper, we will focus on the Resonance positions, Partial and total widths for the autoionization into various decay channels of some 1,3 L° doubly excited states of helium-like oxygen ion O 6+ converging on the N=5 hydrogenic thresholds are reported for L=1, 2, 3, 4, 5, 6 and 7. The calculation was made in the framework of the diagonalization method approximation in LS coupling scheme. The partial widths for multi-channel autoionizing levels to sublevels of O 7+ are calculated by neglecting the direct coupling between the open channels. We were able to find results consistent with some in the literature. It is about the configuration P, D, F, G, H, I and K. We could see that the decays are relatively dependent on the ionization thresholds of the residual ion O 7+ . Some analyses are made on these resultast and only according to the level of decay focused in this paper then made a surplus in the framework of nuclear spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Multi-channel Decay Partial Widths of 1,3L° Autoionizing Levels of O6+ Below N=5 Threshold

Ndiaye¹,

Ba²,

Faye³

et al. 2021

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Modified Atomic Orbital Theory of the O+ Ion Originating from 2D0 and 4S0 Metastable States

Sow¹,

Ndoye²,

Diop³

et al. 2022

JAMP

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Variational Calculation of the Doubly-Excited States Nsnp of He-Like Ions via the Modified Atomic Orbitals Theory

Cited by 2 publications

References 31 publications

Multi-channel Decay Partial Widths of <sup>1,3</sup>L° Autoionizing Levels of O<sup>6+</sup> Below N=5 Threshold

Multi-channel Decay Partial Widths of <sup>1,3</sup>L° Autoionizing Levels of O<sup>6+</sup> Below N=5 Threshold

Modified Atomic Orbital Theory of the O<sup>+</sup> Ion Originating from <i>2D<sup>0</sup></i> and <i>4S<sup>0</sup></i> Metastable States

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Variational Calculation of the Doubly-Excited States Nsnp of He-Like Ions via the Modified Atomic Orbitals Theory

Cited by 2 publications

References 31 publications

Multi-channel Decay Partial Widths of &lt;sup&gt;1,3&lt;/sup&gt;L° Autoionizing Levels of O&lt;sup&gt;6+&lt;/sup&gt; Below N=5 Threshold

Multi-channel Decay Partial Widths of &lt;sup&gt;1,3&lt;/sup&gt;L° Autoionizing Levels of O&lt;sup&gt;6+&lt;/sup&gt; Below N=5 Threshold

Modified Atomic Orbital Theory of the O&lt;sup&gt;+&lt;/sup&gt; Ion Originating from &lt;i&gt;2D&lt;sup&gt;0&lt;/sup&gt;&lt;/i&gt; and &lt;i&gt;4S&lt;sup&gt;0&lt;/sup&gt;&lt;/i&gt; Metastable States

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Multi-channel Decay Partial Widths of <sup>1,3</sup>L° Autoionizing Levels of O<sup>6+</sup> Below N=5 Threshold

Multi-channel Decay Partial Widths of <sup>1,3</sup>L° Autoionizing Levels of O<sup>6+</sup> Below N=5 Threshold

Modified Atomic Orbital Theory of the O<sup>+</sup> Ion Originating from <i>2D<sup>0</sup></i> and <i>4S<sup>0</sup></i> Metastable States