Role of the Coulomb Potential in Compton Scattering

Authors :: Melzer, N.
Kircher, M.
Pier, A.
Kaiser, L.
Kruse, J.
Anders, N.
Stindl, J.
Sommerlad, L.
McGinnis, D.
Schmidt, M.
Nowak, L.
Kügler, A.
Dwojak, I.
Drnec, J.
Trinter, F.
Schöffler, M. S.
Schmidt, L. Ph.
Novikovskiy, N. M.
Demekhin, Ph. V.
Jahnke, T.
Dörner, R.
Source :: Physical Review Letters 133 (2024) 183002
Publication Year :: 2024
Abstract: We report a fully differential study of ionization of the Ne L-shell by Compton scattering of 20 keV photons. We find two physical mechanisms which modify the Compton-electron emission. Firstly, we observe scattering of the Compton electrons at their parent nucleus. Secondly, we find a distinct maximum in the electron momentum distribution close-to-zero momentum which we attribute to a focusing of the electrons by the Coulomb potential.<br />Comment: 5 pages, 4 figures