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physics.atom-ph2026
Comparative study of nonperturbative electron-positron pair production by intense laser fields colliding with either bremsstrahlung -rays or relativistic ions
S. Remme, A. B. Voitkiv, S. Villalba-Chávez +1
It is well known that electron-positron pairs can be created in the strong-field environments formed by (i) a high-intensity laser field and a high-energy -photon (nonlinear Bre…
physics.atom-ph2025
Phenomenological rate formulas for over-barrier ionization of hydrogen and helium atoms in strong constant electric fields
S. Remme, A. B. Voitkiv, G. Pretzler +1
Nonrelativistic over-barrier ionization (OBI) of atoms in strong electric fields is studied, focussing on hydrogen and helium as concrete examples. Our goal is, on the one hand, to…