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Optics and Spectroscopy

Photon–Photon Scattering in the Atomic Ion Field

A. N. Hopersky, A. M. Nadolinsky, R. V. Koneev

Published Mar 1, 2024• 0 citations
Publisher

Abstract

Abstract The analytical structure, absolute values and angular anisotropy of the triple differential cross section of elastic photon–photon scattering in the field of a multicharged neon-like atomic ion are theoretically predicted.
DOI
10.1134/s0030400x2403010x

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Elastic cross-sections for electron scattering on neon from 0 energy up to 16 eV are analyzed by an analytical approach to the modified effective range theory (MERT). It is shown that energy and angular variations of elastic differential, integral and momentum transfer cross-sections can be accurately parameterized by six MERT coefficients up to the energy threshold for the first Feshbach resonance. MERT parameters are determined empirically by numerical comparison with large collection of available experimental data of elastic total (integral) cross-sections. The present analysis is validated against numerous electron beams and swarm experiments. The comparison of derived MERT parameters with those found for other noble gases, helium, argon and krypton, is done. The derived scattering length (for the s-partial wave) in neon, 0.227 a 0, agrees well with recent theories; it is small but, differently from Ar and Kr, still positive. Analogue parameters for the p-wave and the d-wave are negative and positive respectively for all the four gases compared.