Parity nonconservation in high-Zheliumlike ions

Detection of parity-violating asymmetries in 1s1/22p1/2{}³P₀-1s²{}¹S₀ two-photon transitions in high-Z He-like ions is discussed. The circular polarization asymmetry of one of the two photons emitted in the two-photon decay of the 2³{P}₀level in He-like uranium is of order 3×{10}^{{{-}}4}$. Parity-violating asymmetries in the laser-driven processes of singly stimulated two-photon emission and anti-Stokes Raman scattering are also discussed. Further experimental and theoretical research is needed to determine if parity experiments based on these processes are feasible. {} 1996 The American Physical Society.