Semirelativistic (e,2e) study with a twisted electron beam on Cu and Ag

Aditi Mandal (1) , Nikita Dhankhar (1) , D. Sébilleau (2) , Rakesh Choubisa (1)

1 BITS Pilani - Birla Institute of Technology and Science
2 IPR - Institut de Physique de Rennes

In this communication, we report our calculations of Triple Differential Cross-Section (TDCS) for relativistic (e,2e) with twisted electron beam on heavy atomic targets, namely Cu, Au and Ag, in coplanar asymmetric geometry mode. The formalism has been developed in the first Bornapproximation using the Dirac plane wave as well as the twisted electron wave for the incident electron to study the effect of various parameters of the twisted electron on the relativistic (e,2e) process. We use Dirac plane wave, semi relativistic Coulomb wave and Darwin wave function forthe scattered, ejected and K-shell electron respectively. We compare the angular profile of the TDCS for different values of Orbital Angular Momentum (OAM) (m) of the twisted electron with that of the plane wave. We segregate the TDCS for charge-charge interaction and current-current interaction with their interference term and study the effect of various parameters of the twisted electron beam on them, namely opening angle (θp), OAM number (m) and impact parameter (b). The spin asymmetry in TDCS caused by polarized incident electron beam is also studied to elucidate the effects of twisted electron beam on relativistic (e,2e) process.

Domaines: Physique Atomique [physics.atom-ph]

Aditi Mandal, Nikita Dhankhar, D. Sébilleau, Rakesh Choubisa. Semirelativistic (e,2e) study with a twisted electron beam on Cu and Ag. Physical Review A, 2021, 104 (5), pp.052818. ⟨10.1103/PhysRevA.104.052818⟩. ⟨hal-03448728⟩