Charge and energy-dependence of the Gaussian description of the triply differential cross sections for equal-energy sharing photo-double-ionization of two-electrons ions

Journal Article · Tue Mar 01 04:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.034703· OSTI ID:20650522

Otranto, S ^[1]; Garibotti, C R ^[2]

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1. CONICET and Departamento de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina)
2. CONICET and Centro Atomico Bariloche, 8400 S. C. de Bariloche (Argentina)

We evaluate triply differential cross sections (TDCSs) for the photo-double-ionization (PDI) of He-like ions, and equal electron energy sharing, by using the SC3 model for the three-body final state. These cross sections are fitted with the usual dipolar Gaussian form which is found able to describe the theoretical TDCS, and could be applied for the interpretation of experimental data even at intermediate photon energies. We determine the dependence of the correlation factor on the excess energy (E{sub f}) and target nuclear charge (Z). We find that its width has an E{sub f}{sup 1/4} dependence near the atomic double-ionization threshold but departs from this law and attains a plateau as the excess energy increases. We compare our results with the predictions of classical and semiclassical Wannier approaches.

• OSTI ID: 20650522
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 71; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC NUMBER
COMPARATIVE EVALUATIONS
CORRELATIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRONS
ENERGY DEPENDENCE
MULTICHARGED IONS
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PHOTONS
SEMICLASSICAL APPROXIMATION
THREE-BODY PROBLEM