Regular Article

Strongly resolved diffraction resonances in positronium formation from C₆₀ in forward direction^★

¹ Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, 67000 Strasbourg, France
² Department of Natural Sciences, D.L. Hubbard Center for Innovation, Northwest Missouri State University Maryville, Missouri 64468, USA

^a e-mail: hervieux@unistra.fr
^b e-mail: himadri@nwmissouri.edu

Received: 31 October 2019
Received in final form: 21 November 2019
Published online: 19 December 2019

Abstract

Positronium formation by capturing from various levels of C₆₀ within 10 degrees around the incoming positron direction is calculated. Results indicate dominant strength of the Ps signal and higher res-olution of the diffraction resonances, predicted earlier [P.A. Hervieux, A.R. Chakraborty, H.S. Chakraborty, Phys. Rev. A 95, 020701(R) (2017)], in the forward direction. This raises the possibility of experimental deter-mination of the resonances in angle differential measurements. We further analyze our results by comparing the positron scattering versus positron-electron pairing components of the amplitude for better insights.