Parity-Nonconserving Optical Rotation at 876 nm in Bismuth

Macpherson, M.J. ; Stacey, D.N. ; Baird, P.E.G. ; et al.
EPL 4 (1987) 811-816, 1987.
Inspire Record 1408819 DOI 10.17182/hepdata.70515

We have measured parity-nonconserving optical rotation in the vicinity of the M1 absorption transition at 876 nm in bismuth. The result, R = Im(E1PNC/M1) = (-10.0 ± 1.0) centerdot 10-8, is in agreement with calculations based on the standard model of the electroweak interaction. The predicted form of the PNC rotation spectrum has been verified to high accuracy.

1 data table

No description provided.


Measurement of parity non-conserving optical rotation in the 648 nm transition in atomic bismuth

Taylor, J.D. ; Baird, P.E.G. ; Hunt, R.G. ; et al.
J.Phys.B 20 (1987) 5423-5442, 1987.
Inspire Record 1393361 DOI 10.17182/hepdata.38568

Parity non-conserving (PNC) optical rotation has been measured by laser polarimetry in the 648 nm magnetic dipole transition (6p$^{3}J$=$\frac{3}{2}\rightarrow$6p$^{3}J'=\frac{5}{2}$) in atomic bismuth. The experiment involves finding the small differences in rotation between selected frequency points in the vicinity of the F = 6 $\rightarrow$ F' = 7 hyperfine component. Faraday rotation, which can be distinguished from PNC rotation by its wavelength dependence, is used in locking the laser frequency and calibrating the PNC' effect. Results obtained over a six-year period are summarised; a detailed discussion of error sources and associated tests is given. The final result for the PNC parameter of the 648 nm transition is R = (-9.3 $\pm$ 1.4)X10$^{-8}$. This is in agreement with the measurements of Birich et a/ but not with those of Barkov and Zolotorev. It is also consistent with the standard model of the electroweak interaction, but the uncertainty in the atomic theory is now the limiting factor in the comparison.

2 data tables

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Axis error includes +- 0.0/0.0 contribution (?////).