Comparative study of nonperturbative electron-positron pair production by intense laser fields colliding with either bremsstrahlung $\gamma$-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 $\gamma$-photon (nonlinear Bre…