TY - JOUR A1 - Martensson, Nils A1 - Föhlisch, Alexander A1 - Svensson, Svante T1 - Uppsala and Berkeley BT - two essential laboratories in the development of modern photoelectron spectroscopy JF - Journal of vacuum science & technology : JVST ; an AVS journal / A N2 - 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. KW - Electronic structure KW - Condensed matter physics KW - X-ray emission spectroscopy KW - Electron spectroscopy KW - Photoelectron spectroscopy KW - Nuclear physics KW - Storage rings KW - Synchrotron radiation KW - Gas phase KW - Surface science Y1 - 2022 U6 - https://doi.org/10.1116/6.0001879 SN - 0734-2101 SN - 1520-8559 VL - 40 IS - 4 PB - American Institute of Physics CY - New York ER -