Electron impact ionization data for the iron isonuclear sequence

Pindzola, M. S.; Griffin, D. C.; Böttcher, C.; Younger, S.M.; Hunter, H.T.

doi:10.1088/0029-5515/27/s1/002

Cited by 35 publications

(55 citation statements)

References 17 publications

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“…Most of this data About the ionization rates we would like to remark that recently Kato et al (1991) reviewed and compared the rates obtained with several empirical formulae used by Lotz (1967Lotz ( , 1968, by the Belfast group (Bell et al 1983 andLennon et al 1988), by AR85 and AR, and by Pindzola et al (1987). They conclude that generally the rate coefficient derived on the basis of experimental data of cross sections are in good agreement among the various authors.…”

Section: Discussionmentioning

confidence: 53%

Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to Ni

Mazzotta

Mazzitelli

Colafrancesco

et al. 1998

Astron. Astrophys. Suppl. Ser.

974

1,219

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Abstract. We present in this paper new and updated calculations of the ionization equilibrium for all the elements from H to Ni. We collected for these elements all the data available in the literature for the ionization and radiative plus dielectronic recombination rates. In particular, the dielectronic rates have been fitted with a single formula and the related coefficients are tabulated. Our results are compared with previous works.

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Section: Discussionmentioning

confidence: 53%

Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to Ni

Mazzotta

Mazzitelli

Colafrancesco

et al. 1998

Astron. Astrophys. Suppl. Ser.

974

1,219

View full text Add to dashboard Cite

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“…For Fe viii, the recent measurements of Hahn et al (2015) were used, from the ionization threshold up to 1200 eV. They remain 30-40% lower than theoretical calculations of Arnaud & Raymond (1992), based on Pindzola et al (1987), and are in good agreement (10%) with D07. The reason for these discrepancies are similar to the case of Fe xi, as explained in section 3.16.1.…”

Section: Di: 3d and 4s Cross-sectionsmentioning

confidence: 93%

X-ray emission from thin plasmas

Urdampilleta

Kaastra

Mehdipour

2017

A&A

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Every observation of astrophysical objects involving a spectrum requires atomic data for the interpretation of line fluxes, line ratios, and ionization state of the emitting plasma. One of the processes that determines it is collisional ionization. In this study, an update of the direct ionization (DI) and excitation-autoionization (EA) processes is discussed for the H to Zn-like isoelectronic sequences. In recent years, new laboratory measurements and theoretical calculations of ionization cross-sections have become available. We provide an extension and update of previous published reviews in the literature. We include the most recent experimental measurements and fit the cross-sections of all individual shells of all ions from H to Zn. These data are described using an extension of Younger's and Mewe's formula, suitable for integration over a Maxwellian velocity distribution to derive the subshell ionization rate coefficients. These ionization rate coefficients are incorporated in the high-resolution plasma code and spectral fitting tool SPEX V3.0.

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“…Electronic data is available at IAEA/ALADDIN [12]. We also note that previous CADW calculations for the electron-impact ionization of the Fe [13], Ni [14], Kr [15], Sn [16], Xe [16], and W [17] isonuclear sequences are being updated with RMPS and TDCC calculations for the atoms and low-charged ions. …”

Section: Isonuclear Sequence Databasesmentioning

confidence: 99%

Atomic Collision Processes for Astrophysical and Laboratory Plasmas

Pindzola

Loch

Ballance

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. An accurate knowledge of atomic collision processes is important for a better understanding of many astrophysical and laboratory plasmas. Collision databases which contain electron-impact excitation, ionization, and recombination cross sections and temperature dependent rate coefficients have been constructed using perturbative distorted-wave methods and non-perturbative R-matrix pseudo-states and time-dependent close-coupling methods. We present recent atomic collision results. IntroductionAccurate atomic and molecular databases underpin current research efforts in a variety of scientific and engineering areas: including controlled fusion energy, astrophysics, radiation biophysics, fluorescent lamps, and atmospheric pollutant removal. For example, all light elements (H-O) are of interest for fusion experiments; in particular Li and B as wall coating materials and Be and C as primary wall materials.Over the years both theory and experiment have provided increasingly more accurate cross sections for the electron-impact excitation, ionization, and recombination of atoms and their ions. In this paper we review perturbative distorted-wave methods and non-perturbative R-matrix with pseudo-states and time-dependent close-coupling methods in both their non-relativistic and fully-relativistic versions.The rest of the review paper is structured as follows: in Section II we describe distorted-wave, R-matrix, and time-dependent close-coupling methods and give an electron-impact ionization cross section example, and in Section III we give a brief review of current projects.

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Electron impact ionization data for the iron isonuclear sequence

Abstract: Atomic data for the electron impact ionization of ions in the iron isonuclear sequence are reviewed. The best available data are identified. Comments are made on current research activities leading to future data for iron ions.

Cited by 35 publications

References 17 publications

Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to Ni

Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to Ni

X-ray emission from thin plasmas

Atomic Collision Processes for Astrophysical and Laboratory Plasmas

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