Differential Cross Sections for Double Excitation of the Autoionizing States of Helium by 100-150 KeV Proton Impact
Autoionizing (2s 2) 1S, (2p 2) 1D and (2s2p) 1P resonances in projectile energy loss spectra are studied theoretically for protons scattered on atomic helium. The differential resonance yield, as a function of the scattering angle, is the quantity of primary attention. The effects of the Coulomb interaction in the final state and the projectile-core interaction on the differential resonance yield are studied. Comparison with the experimental data of Schulz et al (1995) (Schulz M, Htwe W T, Gauss A D, Peacher J L and Vajnai T 1995 Phys. Rev. A 51 2140-50) is presented. Comparison is also made with calculations for differential cross sections of double excitation.
A. L. Godunov et al., "Differential Cross Sections for Double Excitation of the Autoionizing States of Helium by 100-150 KeV Proton Impact," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 35, no. 11, pp. 2477-2492, Institute of Physics - IOP Publishing, May 2002.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/35/11/307
Keywords and Phrases
Ionization; Protons; Resonance; Scattering; Autoionizing resonances; Helium
International Standard Serial Number (ISSN)
Article - Journal
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