Task: Text Categorization
Input (English): Kleppner and Ramsey used a similar apparatus as this experiment to achieve population inversion in MASERS, and similar results were determined for ground-state hydrogen by Phipps and Taylor five years after this experiment. The phenomenon observed was due to torque effects causing precession in (*) dipoles which produced two spots on a photographic plate, rather than the classically predicted spread. The apparatus in this experiment consisted of a furnace of boiling silver, from which atoms were directed through a magnetic field before the silver beam split in two. FTP, identify this experiment conducted by and named for two Germans, in which the quantization of electron spin was confirmed.
Output (English): Science