1. Precision spectroscopy of the 2S‐4P transition in atomic hydrogen on a cryogenic beam of optically excited 2S atoms. Issue 8 (17th June 2013) Authors: Beyer, Axel; Alnis, Janis; Khabarova, Ksenia; Matveev, Arthur; Parthey, Christian G.; Yost, Dylan C.; Pohl, Randolf; Udem, Thomas; Hänsch, Theodor W.; Kolachevsky, Nikolai; Blaum, Klaus; Müller, Holger; Severijns, Nathal Journal: Annalen der Physik Issue: Volume 525:Issue 8/9(2013) Page Start: 671 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗