Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions
In the present work, a detailed study on the electron impact excitation of Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>7</mn><mo>+</mo>...
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/2218-2004/9/4/76 |
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| author | Aloka Kumar Sahoo Lalita Sharma |
| author_facet | Aloka Kumar Sahoo Lalita Sharma |
| author_sort | Aloka Kumar Sahoo |
| collection | DOAJ |
| description | In the present work, a detailed study on the electron impact excitation of Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>7</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula>, Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>8</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula>, Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>9</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula> and Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>10</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula> ions for the dipole allowed (E1) transitions in the EUV range of 8–19 nm is presented. The multi-configuration Dirac–Fock method is used for the atomic structure calculation including the Breit and QED corrections along with the relativistic configuration interaction approach. We have compared our calculated energy levels, wavelengths and transition rates with other reported experimental and theoretical results. Further, the relativistic distorted wave method is used to calculate the cross sections from the excitation threshold to 3000 eV electron energy. For plasma physics applications, we have reported the fitting parameters of these cross sections using two different formulae for low and high energy ranges. The rate coefficients are also obtained using our calculated cross sections and considering the Maxwellian electron energy distribution function in the electron temperature range from 5 eV to 100 eV. |
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| spelling | doaj.art-65cc3f42a52a47d1be3f0f4e2c9307072023-11-23T03:47:49ZengMDPI AGAtoms2218-20042021-10-01947610.3390/atoms9040076Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> IonsAloka Kumar Sahoo0Lalita Sharma1Department of Physics, Indian Institute of Technology, Roorkee 247667, IndiaDepartment of Physics, Indian Institute of Technology, Roorkee 247667, IndiaIn the present work, a detailed study on the electron impact excitation of Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>7</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula>, Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>8</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula>, Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>9</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula> and Xe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mn>10</mn><mo>+</mo></mrow></msup></semantics></math></inline-formula> ions for the dipole allowed (E1) transitions in the EUV range of 8–19 nm is presented. The multi-configuration Dirac–Fock method is used for the atomic structure calculation including the Breit and QED corrections along with the relativistic configuration interaction approach. We have compared our calculated energy levels, wavelengths and transition rates with other reported experimental and theoretical results. Further, the relativistic distorted wave method is used to calculate the cross sections from the excitation threshold to 3000 eV electron energy. For plasma physics applications, we have reported the fitting parameters of these cross sections using two different formulae for low and high energy ranges. The rate coefficients are also obtained using our calculated cross sections and considering the Maxwellian electron energy distribution function in the electron temperature range from 5 eV to 100 eV.https://www.mdpi.com/2218-2004/9/4/76MCDF wavefunctionswavelengthstransition ratesrelativistic distorted wave methodcross sectionsrate coefficients |
| spellingShingle | Aloka Kumar Sahoo Lalita Sharma Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions Atoms MCDF wavefunctions wavelengths transition rates relativistic distorted wave method cross sections rate coefficients |
| title | Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions |
| title_full | Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions |
| title_fullStr | Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions |
| title_full_unstemmed | Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions |
| title_short | Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe<sup>7</sup>–Xe<sup>10</sup> Ions |
| title_sort | electron impact excitation of extreme ultra violet transitions in xe sup 7 sup xe sup 10 sup ions |
| topic | MCDF wavefunctions wavelengths transition rates relativistic distorted wave method cross sections rate coefficients |
| url | https://www.mdpi.com/2218-2004/9/4/76 |
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