Uppsala and Berkeley: Two essential laboratories in the development of modern photoelectron spectroscopy

The development of modern photoelectron spectroscopy is reviewed with a special focus on the importance of research at Uppsala University and at Berkeley. The influence of two pioneers, Kai Siegbahn and Dave Shirley, is underlined. Early interaction between the two centers helped to kick-start the field. Both laboratories have continued to play an important role in the field, both in terms of creating new experimental capabilities and developing the theoretical understanding of the spectroscopic processes. (C)2022 Author(s).

Automated summary

This article reviews the importance of the development of modern photoelectron spectroscopy, with a special focus on the research at Uppsala University and at Berkeley. The influence of two pioneers, Kai Siegbahn and Dave Shirley, is highlighted. The early interaction between the two centers helped to kick-start the field, and both laboratories continue to play a crucial role in creating new experimental capabilities and developing the theoretical understanding of spectroscopic processes.