Low-energy positron scattering from C2H2

Abstract

We present positron scattering cross sections with C2H2 molecules obtained with the Method of Continued Fractions in the static plus correlation polarization level. The differential and integral cross sections are compared with available theoretical and experimental approaches, and sensible improvement in the description of the qualitative behaviour of the differential cross sections is observed. These improvements are discussed through the evaluation of the average absolute differences between theoretical approaches and the respective normalized experimental data. Our elastic integral cross sections exhibit good agreement with model and ab initio approaches and with the available experimental data.

Recent studies with electrons, positrons and positronium

“…swarm physics illustrate the current focus of the field, with several contributed topical reviews[12,16,18,22] highlighting progress made up to now. Specifically, positron and positronium scattering or structure calculations on a range of targets were reported by Barp and Arretche[1], Hervieux and Chakraborty[3], Ellis-Gibbings et al[4], Arretche et al[5], Tenfen et al[10], Seidel and Arretche[11], DeMars et al[14], Ono et al[23], and Yazejian and Straton[24]. A comprehensive series of electron scattering, both theoretical and experimental, contributed topical reviews, covering a very wide variety of molecules, were contributed by Scarlett et al[12], Gorfinkiel[16], Song et al[18], and Lopes et al[22].…”