Abstract
The spin-exchange optical polarization method was used to determine the sign and the magnitude of the hyperfine interaction constant in the ground state of atomic . The measurements were made by monitoring the transmission of circularly polarized rubidium () resonance radiation through a flask containing rubidium, atomic phosphorus, and a buffer gas as a function of the frequency of an external radio-frequency field. The value for the hyperfine interaction constant of obtained by extrapolation to zero pressure in a helium buffer gas is The pressure shifts in cycles/sec/mm Hg of the phosphorus hyperfine interaction constant for helium and neon buffer gases are +3.61±0.23 and +6.73±0.15, respectively.
- Received 31 May 1962
DOI:https://doi.org/10.1103/PhysRev.128.198
©1962 American Physical Society