Photoelectron spectroscopy instrument (IMAGE) Stockholm University Caption The photoelectron spectroscopy instrument was built at Stockholm University and allows studies of catalyst surfaces under high pressures. Photo: Peter Amman Credit Photo: Peter Amman Usage Restrictions For press use License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.