Abstract
The Sommerfeld fine-structure constant has been determined from a direct measurement of the fine-structure separation in the states of atomic hydrogen using the level-crossing technique. From the changes in resonance fluorescence caused by level crossing at 3484 G, we obtain a value for the fine-structure separation MHz and . The quoted uncertainty represents our estimate of 70% confidence from the analysis of 84 separate runs.
- Received 7 December 1970
DOI:https://doi.org/10.1103/PhysRevA.5.564
©1972 American Physical Society