Collision Strengths of Astrophysical Interest for Multiply Charged Ions

Stephan Fritzsche; Li-Guang Jiao; Yauan-Cheng Wang; Józef Eugeniusz Sienkiewicz

doi:10.3390/atoms11050080

Collision Strengths of Astrophysical Interest for Multiply Charged Ions

Abstrakt

The electron impact excitation and ionization processes are crucial for modeling the spectra of different astrophysical objects, from atmospheres of late-type stars to remnants of supernovae and up to the light emission from neutron star mergers, to name just a few. Despite their signifi- cance, however, little is known quantitatively about these processes for low- and medium-impact energies of, say, Ekin . 5000 eV of the free incident electron. To further explore the role of impact excitation, we here expanded JAC, the Jena Atomic Calculator, to the computation of distorted wave collision strengths for fine-structure-resolved, as well as configuration-averaged transitions. While we excluded the formation of dielectronic resonances, these tools can be readily applied for ions with a complex shell structure and by including the major relativistic contributions to these strengths. Detailed computations of the collision strengths are shown and explained for the impact excitation of lithium- and chlorine-like ions. When compared with other, well-correlated methods, good agreement was found, and hence, these tools will support studies of effective collision strengths for a wide range of electron impact energies, levels, and ionic charge states.

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Autorzy (4)

Stephan Fritzsche
Li-Guang Jiao
Yauan-Cheng Wang
Józef Eugeniusz Sienkiewicz (dawniej: Józef Sienkiewicz) prof. dr hab.

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Wersja publikacji: Accepted albo Published Version
DOI:: Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.3390/atoms11050080
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Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach

Opublikowano w:

Atoms nr 11,
ISSN: 2218-2004

Język:

angielski

Rok wydania:

2023

Opis bibliograficzny:

Sienkiewicz J., Fritzsche S., Jiao L., Wang Y.: Collision Strengths of Astrophysical Interest for Multiply Charged Ions// Atoms -Vol. 11, (2023), s.1-15

DOI: