Abstract
We report a new measurement of parity nonconserving (PNC) optical rotation near the 1.28 m, magnetic dipole transition in thallium. We find the ratio of the PNC amplitude to the amplitude to be , which within the present uncertainty of atomic theory yields the thallium weak charge and the electroweak parameter . Separate measurements on the and ground-state hyperfine components of the transition yield , which limits the size of nuclear spin-dependent PNC in Tl.
- Received 2 November 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.2658
©1995 American Physical Society