Parity‐Violation Studies with Partially Stripped Ions

A theoretical study of photoexcitation highly charged ions from their ground states, a process which can be realized at the Gamma Factory CERN, is presented. Special attention paid to question how excitation rates are affected by mixing opposite-parity ionic levels, induced both an external electric field and weak interaction between electrons nucleus. In order reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on developed approach, detailed calculations performed for 1s 1 / 2 → $_{1/2} \rightarrow$ 2s1/2 s 3 ${\rm 1s}^2 \; {\rm 2s}_{1/2} \rightarrow 3s}_{1/2}$ (M1 + parity–violating–E1) transitions hydrogen- lithium-like ions, respectively. particular, focus difference obtained right- left-circularly polarized incident light. This arises due parity violating levels usually characterized terms circular–dichroism parameter. We argue that future measurements circular dichroism, with SPS or LHC rings, may provide valuable information electron–nucleus weak–interaction coupling.