Electron-Impact Ionization Data for the Nickel Isonuclear Sequence

Pindzola, M. S.; Griffin, D. C.; Böttcher, C.; Buie, Melisa J.; Gregory, D. C.

doi:10.1088/0031-8949/1991/t37/008

Cited by 22 publications

(63 citation statements)

References 15 publications

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“…11. We note that, again for Ni, the cross-sections of Pindzola et al (1991) are 15-25% lower than those of Zhang & Sampson (1990).…”

Section: Isoelectronic Sequencementioning

confidence: 61%

“…The contribution of this metastable state, which is described well by the calculations of Pindzola et al (1991), makes the measured cross-section ∼5% higher at 1 keV; however, owing to the complex ionization cross-section of this metastable state, we do not attempt to subtract it, but merely use the data of Defrance et al (1987) and Zhang et al (2002) for this ion, which appears to be free of metastable contributions.…”

Section: Di: 2p Cross-sectionsmentioning

confidence: 98%

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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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“…11. We note that, again for Ni, the cross-sections of Pindzola et al (1991) are 15-25% lower than those of Zhang & Sampson (1990).…”

Section: Isoelectronic Sequencementioning

confidence: 61%

Section: Di: 2p Cross-sectionsmentioning

confidence: 98%

X-ray emission from thin plasmas

Urdampilleta

Kaastra

Mehdipour

2017

A&A

View full text Add to dashboard Cite

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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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“…DW calculations include rate coefficients from ground and excited levels of Ar L shell ions by Cohen et al (1998), and by Griffin, Bottcher and Pindzola (1982a) and Griffin, Pindzola and Bottcher (1987). Also in this category are the calculations for Na-like and Mg-like ions and Fe 5+ -Fe 13+ by Pindzola et al (1986aPindzola et al ( ,b, 1998, and Mitnik et al (1998), for Fe 0+ by Pindzola et al (1995) and for all ions of Ni by Griffin and Pindzola (1988) and Pindzola et al (1991). CBE calculations of EII with inclusion of EA in the H -C isoelectronic sequences were performed by Sampson andGolden (1979, 1981), and Sampson (1982) made similar calculations for Na-like ions Close-coupling calculations including inner shell excitation and EA were made for Li-like ions of C, N, and O (Henry, 1979), Na-like ions of Al and Si (Henry and Msezane, 1982), and for Fe 23+ using Rmatrix (Butler and Moores, 1985).…”

Section: Experimental Measurementsmentioning

confidence: 99%

Atomic data for x-ray astrophysics

2007

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We review the available atomic data used for interpreting and modeling X-ray observations. The applications for these data can be divided into several levels of detail, ranging from compilations which can be used with direct inspection of raw data, such as line finding lists, to synthetic spectra which attempt to fit to an entire observed dataset simultaneously. This review covers cosmic sources driven by both electron ionization and photoionization and touches briefly on planetary surfaces and atmospheres. We review all of this, the applications to X-ray astronomy, the available data, recommendations for astronomical users, and attempt to point out the applications where the shortcomings are greatest.

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Electron-Impact Ionization Data for the Nickel Isonuclear Sequence

Cited by 22 publications

References 15 publications

X-ray emission from thin plasmas

X-ray emission from thin plasmas

Atomic Collision Processes for Astrophysical and Laboratory Plasmas

Atomic data for x-ray astrophysics

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