Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV)
High-resolution K-shell photoionization cross-sections for the C-like atomic nitrogen ion (N<sup>+</sup>) are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The results were obtained from absolute ion-yield measurements using the SOLEIL synchrotron radiat...
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2021-05-01
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| author | Jean-Paul Mosnier Eugene T. Kennedy Jean-Marc Bizau Denis Cubaynes Ségolène Guilbaud Christophe Blancard Brendan M. McLaughlin |
| author_facet | Jean-Paul Mosnier Eugene T. Kennedy Jean-Marc Bizau Denis Cubaynes Ségolène Guilbaud Christophe Blancard Brendan M. McLaughlin |
| author_sort | Jean-Paul Mosnier |
| collection | DOAJ |
| description | High-resolution K-shell photoionization cross-sections for the C-like atomic nitrogen ion (N<sup>+</sup>) are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The results were obtained from absolute ion-yield measurements using the SOLEIL synchrotron radiation facility for spectral bandpasses of 65 meV or 250 meV. In the photon energy region 398–403 eV, <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mn>2</mn><mi>p</mi></mrow></semantics></math></inline-formula> autoionizing resonance states dominated the cross section spectrum. Analyses of the experimental profiles yielded resonance strengths and Auger widths. In the 415–440 eV photon region <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mrow><mo>(</mo><mrow><mn>1</mn><mi>s</mi><mn>2</mn><msup><mi>s</mi><mn>2</mn></msup><mn>2</mn><msup><mi>p</mi><mrow><mn>2</mn><mo> </mo><mn>4</mn></mrow></msup><mi>P</mi></mrow><mo>)</mo></mrow><mi>n</mi><mi>p</mi></mrow></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mrow><mo>(</mo><mrow><mn>1</mn><mi>s</mi><mn>2</mn><msup><mi>s</mi><mn>2</mn></msup><mn>2</mn><msup><mi>p</mi><mrow><mn>2</mn><mo> </mo><mn>2</mn></mrow></msup><mi>P</mi></mrow><mo>)</mo></mrow><mi>n</mi><mi>p</mi></mrow></semantics></math></inline-formula> resonances forming well-developed Rydberg series up <inline-formula><math display="inline"><semantics><mrow><mi>n</mi><mo>=</mo><mn>7</mn><mo> </mo><mrow><mi>and</mi><mtext> </mtext></mrow><mi>n</mi><mo>=</mo><mn>8</mn><mi> </mi></mrow></semantics></math></inline-formula>, respectively, were identified in both the single and double ionization spectra. Theoretical photoionization cross-section calculations, performed using the R-matrix plus pseudo-states (RMPS) method and the multiconfiguration Dirac-Fock (MCDF) approach were bench marked against these high-resolution experimental results. Comparison of the state-of-the-art theoretical work with the experimental studies allowed the identification of new resonance features. Resonance strengths, energies and Auger widths (where available) are compared quantitatively with the theoretical values. Contributions from excited metastable states of the N<sup>+</sup> ions were carefully considered throughout. |
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| last_indexed | 2024-03-10T11:32:44Z |
| publishDate | 2021-05-01 |
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| spelling | doaj.art-78cadd66d08f469c8151e179cc7137352023-11-21T19:07:26ZengMDPI AGAtoms2218-20042021-05-01922710.3390/atoms9020027Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV)Jean-Paul Mosnier0Eugene T. Kennedy1Jean-Marc Bizau2Denis Cubaynes3Ségolène Guilbaud4Christophe Blancard5Brendan M. McLaughlin6National Centre for Plasma Science and Technology (NCPST), School of Physical Sciences, Dublin City University, Dublin 9, IrelandNational Centre for Plasma Science and Technology (NCPST), School of Physical Sciences, Dublin City University, Dublin 9, IrelandInstitut des Sciences Moléculaires d’Orsay, UMR 8214, Rue André Rivière, Bâtiment 520, Université Paris-Saclay, F-91405 Orsay, FranceInstitut des Sciences Moléculaires d’Orsay, UMR 8214, Rue André Rivière, Bâtiment 520, Université Paris-Saclay, F-91405 Orsay, FranceInstitut des Sciences Moléculaires d’Orsay, UMR 8214, Rue André Rivière, Bâtiment 520, Université Paris-Saclay, F-91405 Orsay, FranceCEA, DAM, DIF, F-91297 Arpajon, FranceCentre for Theoretical Atomic, Molecular and Optical Physics (CTAMOP), School of Mathematics and Physics, The David Bates Building, 7 College Park, Queen’s University Belfast, Belfast BT7 1NN, UKHigh-resolution K-shell photoionization cross-sections for the C-like atomic nitrogen ion (N<sup>+</sup>) are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The results were obtained from absolute ion-yield measurements using the SOLEIL synchrotron radiation facility for spectral bandpasses of 65 meV or 250 meV. In the photon energy region 398–403 eV, <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mn>2</mn><mi>p</mi></mrow></semantics></math></inline-formula> autoionizing resonance states dominated the cross section spectrum. Analyses of the experimental profiles yielded resonance strengths and Auger widths. In the 415–440 eV photon region <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mrow><mo>(</mo><mrow><mn>1</mn><mi>s</mi><mn>2</mn><msup><mi>s</mi><mn>2</mn></msup><mn>2</mn><msup><mi>p</mi><mrow><mn>2</mn><mo> </mo><mn>4</mn></mrow></msup><mi>P</mi></mrow><mo>)</mo></mrow><mi>n</mi><mi>p</mi></mrow></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><mrow><mn>1</mn><mi>s</mi><mo>⟶</mo><mrow><mo>(</mo><mrow><mn>1</mn><mi>s</mi><mn>2</mn><msup><mi>s</mi><mn>2</mn></msup><mn>2</mn><msup><mi>p</mi><mrow><mn>2</mn><mo> </mo><mn>2</mn></mrow></msup><mi>P</mi></mrow><mo>)</mo></mrow><mi>n</mi><mi>p</mi></mrow></semantics></math></inline-formula> resonances forming well-developed Rydberg series up <inline-formula><math display="inline"><semantics><mrow><mi>n</mi><mo>=</mo><mn>7</mn><mo> </mo><mrow><mi>and</mi><mtext> </mtext></mrow><mi>n</mi><mo>=</mo><mn>8</mn><mi> </mi></mrow></semantics></math></inline-formula>, respectively, were identified in both the single and double ionization spectra. Theoretical photoionization cross-section calculations, performed using the R-matrix plus pseudo-states (RMPS) method and the multiconfiguration Dirac-Fock (MCDF) approach were bench marked against these high-resolution experimental results. Comparison of the state-of-the-art theoretical work with the experimental studies allowed the identification of new resonance features. Resonance strengths, energies and Auger widths (where available) are compared quantitatively with the theoretical values. Contributions from excited metastable states of the N<sup>+</sup> ions were carefully considered throughout.https://www.mdpi.com/2218-2004/9/2/27atomic datainner-shell photoionizationatomic nitrogen ion |
| spellingShingle | Jean-Paul Mosnier Eugene T. Kennedy Jean-Marc Bizau Denis Cubaynes Ségolène Guilbaud Christophe Blancard Brendan M. McLaughlin Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) Atoms atomic data inner-shell photoionization atomic nitrogen ion |
| title | Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) |
| title_full | Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) |
| title_fullStr | Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) |
| title_full_unstemmed | Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) |
| title_short | Photoionization Cross-Sections of Carbon-Like N<sup>+</sup> Near the K-Edge (390–440 eV) |
| title_sort | photoionization cross sections of carbon like n sup sup near the k edge 390 440 ev |
| topic | atomic data inner-shell photoionization atomic nitrogen ion |
| url | https://www.mdpi.com/2218-2004/9/2/27 |
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