Regular Article

Laser-assisted (e,2e) ionization of atomic hydrogen in a quasi-Sturmian-Floquet approach^★

¹ Pacific National University, Khabarovsk 680035, Russia
² Université de Lorraine, CNRS, LPCT, 57000 Metz, France
³ Department of Nuclear Physics and Quantum Theory of Collisions, Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia

^a e-mail: zaytsevsa@pnu.edu.ru

Received: 14 November 2018
Received in final form: 18 December 2018
Published online: 21 February 2019

Abstract

We study laser-assisted fast (e, 2e) collisions on atomic hydrogen both in perturbative and in nonperturbative regimes of laser radiation. We calculate multiphoton triple differential cross sections in asymmetric coplanar kinematics employing the first Born approximation in the projectile–target interaction. The study allows us to test the robustness of our recently formulated quasi-Sturmian-Floquet method to treat the dressing of the initial and final atomic states by the laser field. In both radiation regimes our method exhibits high efficiency for different net numbers of photons exchanged between the colliding system and the laser field.