Four-body quantum dynamics of two-center electronic transitions in relativistic ion-atom collisions and target recoil momentum spectroscopy

TL;DR

This paper presents a detailed relativistic quantum analysis of two-center electronic transitions in ion-atom collisions, highlighting the influence of relativistic effects and projectile electrons on recoil momentum spectra, with implications for experimental measurements.

Contribution

It introduces a novel approach to describe relativistic four-body quantum dynamics in ion-atom collisions, focusing on recoil momentum spectroscopy and the role of projectile electrons.

Findings

Relativistic and higher order effects significantly influence recoil momentum spectra.

Projectile electrons have a surprisingly strong impact on momentum transfer.

Recoil momentum measurements can reveal detailed information about inelastic collision processes.

Abstract

We consider relativistic collisions of heavy hydrogen-like ions with hydrogen and helium atoms in which the ion-atom interaction causes both colliding particles to undergo transitions between their internal states. Using an approach enabling one, for the first time, to give a detailed description of this important case of the relativistic quantum few-body problem we concentrate on the study of the longitudinal momentum spectrum of the atomic recoil ions. We discuss the role of relativistic and higher order effects, predict a surprisingly strong influence of the projectile's electron on the momentum transfer, draw the general picture of the recoil ion formation and show that the important information about the doubly inelastic collisions could be obtained in experiment merely by measuring the recoil momentum spectrum.