# Pair production by an electron to excited levels in a magnetic field

## TL;DR

This paper investigates electron-positron pair production in a magnetic field, focusing on excited Landau levels and spin effects, revealing spin-flip emissions are significant in the process.

## Contribution

It provides a detailed analysis of pair production to excited Landau levels, including the spin dependency of the process rate and the role of spin flips in virtual photon emissions.

## Key findings

- Spin state with highest rate involves electron spin flip during virtual photon emission.
- Process rate is spin-dependent and not suppressed in certain transitions.
- Pair production to excited levels is significantly influenced by electron spin states.

## Abstract

The resonant process of electron-positron pairproduction by an electron in a subcritical magnetic field has been studied when the pair is produced to exited Landau levels. The spin dependency of the process rate has been analyzed. In the spin state with the greatest rate the virtual photon is emitted with a flip of electron spin. This behavior is not suppressed for radiative transitions from a relativistic initial state to low energy levels.