Photoionization of Atoms
Photoionization is a process of ionization by photons. It is one of the most important processes for studying astronomical objects. This Special Issue will provide an overview of photoionization, characteristic features, data availability, and the methodologies used to study these topics both experi...
שמור ב:
| פורמט: | Online |
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| שפה: | אנגלית |
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MDPI - Multidisciplinary Digital Publishing Institute
2025
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| נושאים: | |
| גישה מקוונת: | ONIX_20250220_9783725826711_382 |
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| _version_ | 1869529306394263552 |
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| collection | Directory of Open Access Books |
| description | Photoionization is a process of ionization by photons. It is one of the most important processes for studying astronomical objects. This Special Issue will provide an overview of photoionization, characteristic features, data availability, and the methodologies used to study these topics both experimentally and theoretically. Photoionization proceeds directly, exhibiting a smooth background, through a two-step process when an autoionizing state forms before ionization, introducing resonances. Only one theoretical approach, close coupling approximation, reproduces resonances along with the background. Theoretical studies have the advantage of covering a wide energy range and many excited states. Hence, much more theoretical research has been carried out in comparison to experiments, which are limited by the number of sophisticated set-ups required. Experimentation is challenging. The now-surpassed third-generation synchrotron facilities gave access to high photon flux. However, founding agencies often prefer to support applied research because of the relatively immediate and abundant number of publications associated with the lack of a profound understanding. This Special Issue hopes to change this attitude. |
| format | Online |
| id | doab-20.500.12854ir-153018 |
| institution | Directory of Open Access Books |
| language | eng |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI - Multidisciplinary Digital Publishing Institute |
| publisherStr | MDPI - Multidisciplinary Digital Publishing Institute |
| record_format | ojs |
| spelling | doab-20.500.12854ir-1530182025-02-20T13:26:09Z Photoionization of Atoms Nahar, Sultana N. Hinojosa, Guillermo scattering functions photoabsorption photoionization radiative attachment opacity atomic processes in plasma Debye–Hückel α and β emissions multiconfiguration method photo-absorption photoionization cross-sections autoionizing resonances saturation technique optogalvanic atomic beam time-of-flight mass spectrometry relativistic multi-configurations interaction R-matrix method phosphorus isoelectronic ion Cl IV merged-beams technique autoionization resonances plasma broadening recombination massive stars Wolf–Rayet stars local thermodynamic equilibrium (LTE) nLTE stars stellar atmospheres atomic data inner-shell excitation chlorine ion resonance energy quantum defect Rydberg series effective charges ground state excited state SCUNC energies transition parameters photo-excitation cross-sections photoabsorption spectra lanthanide ions - Ho I-III Er I-IV Tm I-V Yb I-VI Lu I-VII broad emission bumps thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time Photoionization is a process of ionization by photons. It is one of the most important processes for studying astronomical objects. This Special Issue will provide an overview of photoionization, characteristic features, data availability, and the methodologies used to study these topics both experimentally and theoretically. Photoionization proceeds directly, exhibiting a smooth background, through a two-step process when an autoionizing state forms before ionization, introducing resonances. Only one theoretical approach, close coupling approximation, reproduces resonances along with the background. Theoretical studies have the advantage of covering a wide energy range and many excited states. Hence, much more theoretical research has been carried out in comparison to experiments, which are limited by the number of sophisticated set-ups required. Experimentation is challenging. The now-surpassed third-generation synchrotron facilities gave access to high photon flux. However, founding agencies often prefer to support applied research because of the relatively immediate and abundant number of publications associated with the lack of a profound understanding. This Special Issue hopes to change this attitude. 2025-02-20T13:26:07Z 2025-02-20T13:26:07Z 2024 book ONIX_20250220_9783725826711_382 9783725826711 9783725826728 https://directory.doabooks.org/handle/20.500.12854/153018 eng application/octet-stream Attribution 4.0 International https://mdpi.com/books/pdfview/book/10231 MDPI - Multidisciplinary Digital Publishing Institute 10.3390/books978-3-7258-2672-8 10.3390/books978-3-7258-2672-8 46cabcaa-dd94-4bfe-87b4-55023c1b36d0 9783725826711 9783725826728 246 Basel open access |
| spellingShingle | scattering functions photoabsorption photoionization radiative attachment opacity atomic processes in plasma Debye–Hückel α and β emissions multiconfiguration method photo-absorption photoionization cross-sections autoionizing resonances saturation technique optogalvanic atomic beam time-of-flight mass spectrometry relativistic multi-configurations interaction R-matrix method phosphorus isoelectronic ion Cl IV merged-beams technique autoionization resonances plasma broadening recombination massive stars Wolf–Rayet stars local thermodynamic equilibrium (LTE) nLTE stars stellar atmospheres atomic data inner-shell excitation chlorine ion resonance energy quantum defect Rydberg series effective charges ground state excited state SCUNC energies transition parameters photo-excitation cross-sections photoabsorption spectra lanthanide ions - Ho I-III Er I-IV Tm I-V Yb I-VI Lu I-VII broad emission bumps thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time Photoionization of Atoms |
| title | Photoionization of Atoms |
| title_full | Photoionization of Atoms |
| title_fullStr | Photoionization of Atoms |
| title_full_unstemmed | Photoionization of Atoms |
| title_short | Photoionization of Atoms |
| title_sort | photoionization of atoms |
| topic | scattering functions photoabsorption photoionization radiative attachment opacity atomic processes in plasma Debye–Hückel α and β emissions multiconfiguration method photo-absorption photoionization cross-sections autoionizing resonances saturation technique optogalvanic atomic beam time-of-flight mass spectrometry relativistic multi-configurations interaction R-matrix method phosphorus isoelectronic ion Cl IV merged-beams technique autoionization resonances plasma broadening recombination massive stars Wolf–Rayet stars local thermodynamic equilibrium (LTE) nLTE stars stellar atmospheres atomic data inner-shell excitation chlorine ion resonance energy quantum defect Rydberg series effective charges ground state excited state SCUNC energies transition parameters photo-excitation cross-sections photoabsorption spectra lanthanide ions - Ho I-III Er I-IV Tm I-V Yb I-VI Lu I-VII broad emission bumps thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time |
| topic_facet | scattering functions photoabsorption photoionization radiative attachment opacity atomic processes in plasma Debye–Hückel α and β emissions multiconfiguration method photo-absorption photoionization cross-sections autoionizing resonances saturation technique optogalvanic atomic beam time-of-flight mass spectrometry relativistic multi-configurations interaction R-matrix method phosphorus isoelectronic ion Cl IV merged-beams technique autoionization resonances plasma broadening recombination massive stars Wolf–Rayet stars local thermodynamic equilibrium (LTE) nLTE stars stellar atmospheres atomic data inner-shell excitation chlorine ion resonance energy quantum defect Rydberg series effective charges ground state excited state SCUNC energies transition parameters photo-excitation cross-sections photoabsorption spectra lanthanide ions - Ho I-III Er I-IV Tm I-V Yb I-VI Lu I-VII broad emission bumps thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time |
| url | ONIX_20250220_9783725826711_382 |