Modeling of transient interference phenomena in colinear laser spectroscopy

Colinear laser spectroscopy of fast atomic beams has been established as one the main tools to perform precision experiments with atoms containing short-lived nuclei. Although highly sensitive, spectral resolution these techniques is typically limited several MHz. Here, we study use transient interference phenomena potentially improve experimental resolution. Previous attempts implement Ramsey-type measurements were by lack understanding observed line shapes. By using a simple model, provide satisfactory description previously shapes and propose alternative schemes in ion-beam experiments.