講座

Imaging technique has become a powerful tool in gas-phase experiments for recording the velocity and angular distributions of photofragments or electrons. In this article, basic formalisms that seem to be most essential for the beginner are introduced. First, it describes experimental techniques with which one can obtain three-dimensional velocity distribution from a projected image on the position-sensitive detector. Next, it shows how to convert information of the observed image to that of dynamics in the molecular xed frame, beginning with classical treatments of the frame transformation. Finally, some examples of research papers of photofragment and electron imaging experiments are presented.