Abstract
We study the electron-loss-to-continuum (ELC) cusp experimentally and theoretically by comparing the ionization of projectiles in collisions with and Xe targets, at a beam energy of 75.91 MeV/u. The coincidence measurement between the singly ionized projectile and the energy of the emitted electron is used to compare the shape of the ELC cusp at weak and strong perturbations. A significant energy shift for the centroid of the electron cusp is observed for the heavy target of Xe as compared to the light target of . Our results provide a stringent test for fully relativistic calculations of double-differential cross sections performed in the first-order approximation and in the continuum-distorted-wave approach.
- Received 19 May 2021
- Accepted 24 June 2021
DOI:https://doi.org/10.1103/PhysRevA.104.012809
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