VELOCITY GAUGE MODEL FOR ATOMIC IONIZATION BY AN INTENSE LASER PULSE

V. D. RODRÍGUEZ; M. G. BUSTAMANTE

Salamanca, España

Conferencia; 10th European Conference on Atoms Molecules and Photons ECAMP X; 2010

Spanish Royal Society of Physics

In this work we introduced a model accounting for full initial state coupling to the continuum while neglecting further continuum-continuum transitions. The model also considers transitions between initial state and other discrete states, within the first Born approximation. Other discrete-discrete or discrete-continuum transitions are neglected. The calculations are made in the velocity gauge. The present model leads to a single integro-differential equation for the initial state amplitude. This equation is easily solved using the Goldfine prescription1. We have analytically demonstrated that the sum of all transition probabilities is unity, i.e., the model is unitary. 1. We have analytically demonstrated that the sum of all transition probabilities is unity, i.e., the model is unitary.