Photoionization cross sections


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Atomic data for astrophysics. II. New analytic fits for photoionization cross sections of atoms and ions.
D. A. Verner, G. J. Ferland, K. T. Korista, and D. G. Yakovlev, 1996, ApJ, 465, 487

Abstract. We present a complete set of analytic fits to the non-relativistic photoionization cross sections for the ground states of atoms and ions of elements from H through Si, and S, Ar, Ca, and Fe. Near the ionization thresholds, the fits are based on the Opacity Project theoretical cross sections interpolated and smoothed over resonances. At higher energies, the fits reproduce calculated Hartree-Dirac-Slater photoionization cross sections.
PostScript 653.1 K, including figures and table.

Analytic fits for partial photoionization cross sections.
D. A. Verner & D. G. Yakovlev, 1995, A&AS, 109, 125

Abstract. We present a compact, uniform and complete set of analytic fits to the partial Hartree-Dirac-Slater photoionization cross sections for the ground state shells of all atoms and ions of elements from H to Zn (Z <= 30). Comparison with experiment and theory demonstrates generally high accuracy of the fits up to energies of 100 keV.
LaTeX 19.8 K, PostScript 91.4 K (text only).

Isoelectronic sequence fits to configuration-averaged photoionization cross sections and ionization energies.
R. E. H. Clark, R. D. Cowan, & F. W. Bobrowicz, 1986, Atomic Data Nucl. Data Tables, 34, 415.

Description of the tables (2.3 K).

Photoabsorption cross sections for positive atomic ions with Z<=30.
R. F. Reilman & S. T. Manson, 1979, ApJS, 40, 815.

Photon cross sections from 0.1 keV to 1 MeV for elements Z=1 to Z=94.
WM. J. Veigele, 1973, Atomic Data Tables, 5, 51.

Precision measurements of the absolute photoionization cross-sections of He.
J. A. R. Samson, Z. X. He, L. Yin and G. N. Haddad. 1994, J. Phys. B, 27, 887.

Description of the table (0.7 K).

Single and double photoionization cross sections of atomic nitrogen from threshold to 31 A.
J. A. R. Samson & G. C. Angel, 1990, Phys. Rev. A, 42, 1307.

Total photoionization cross sections of atomic oxygen from threshold to 44.3 A.
G. C. Angel & J. A. R. Samson, 1988, Phys. Rev. A, 38, 5578.

Absolute photoionization cross-section tables for helium, neon, argon, and krypton in the VUV spectral regions.
G. V. Marr & J. B. West, 1976, Atomic Data Nucl. Data Tables, 18, 497.

Description of the tables (1.7 K). Note: These data for He I must be superseded by Samson et al. (1994) data (see above). Accuracy of Marr & West data for Ne I and Ar I is worse than it is quoted in the paper.

Other sites:

Opacity Project photoionization cross sections TOPbase

Low-energy X-ray interaction coefficients: photoabsorption, scattering, and reflection E = 30-30,000 eV, Z = 1-92 Henke et al. 1993


Dima Verner (verner@oblako.pa.uky.edu)

Last updated: 1996 October 30
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