Details
| Original language | English |
|---|---|
| Article number | 2100561 |
| Journal | Annalen der Physik |
| Volume | 534 |
| Issue number | 3 |
| Early online date | 2 Feb 2022 |
| Publication status | Published - 8 Mar 2022 |
| Externally published | Yes |
Abstract
A theoretical study of photoexcitation of highly charged ions from their ground states, a process which can be realized at the Gamma Factory at CERN, is presented. Special attention is paid to the question of how the excitation rates are affected by the mixing of opposite-parity ionic levels, which is induced both by an external electric field and the weak interaction between electrons and the nucleus. In order to reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on the developed approach, detailed calculations are performed for the 1s (Formula presented.) 2s1/2 and (Formula presented.) (M1 + parity–violating–E1) transitions in hydrogen- and lithium-like ions, respectively. In particular, we focus on the difference between the excitation rates obtained for the right- and left-circularly polarized incident light. This difference arises due to the parity violating mixing of ionic levels and is usually characterized in terms of the circular–dichroism parameter. We argue that future measurements of circular dichroism, performed with highly charged ions in the SPS or LHC rings, may provide valuable information on the electron–nucleus weak–interaction coupling.
Keywords
- atomic parity violation, circular dichroism, partially stripped ions, photoexcitation
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Annalen der Physik, Vol. 534, No. 3, 2100561, 08.03.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Parity-Violation Studies with Partially Stripped Ions
AU - Richter, Jan
AU - Maiorova, Anna V.
AU - Viatkina, Anna V.
AU - Budker, Dmitry
AU - Surzhykov, Andrey
N1 - Funding Information: The authors are grateful for helpful discussions with Mieczyslaw Witold Krasny and Mikhail Kozlov. This work was funded by the Russian Science Foundation (Grant No. 19‐12‐00157), the GFK‐Fellowship (JGU Mainz), and under Germany's Excellence Strategy–EXC‐2123 QuantumFrontiers–390837967. The work at Mainz was supported by the Deutsche Forschungsgemeinschaft (DFG) ‐ Project ID 423116110 and by the Cluster of Excellence Precision Physics, Fundamental Interactions, and Structure of Matter (PRISMA+ EXC 2118/1) funded by the DFG within the German Excellence Strategy (Project ID 39083149).
PY - 2022/3/8
Y1 - 2022/3/8
N2 - A theoretical study of photoexcitation of highly charged ions from their ground states, a process which can be realized at the Gamma Factory at CERN, is presented. Special attention is paid to the question of how the excitation rates are affected by the mixing of opposite-parity ionic levels, which is induced both by an external electric field and the weak interaction between electrons and the nucleus. In order to reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on the developed approach, detailed calculations are performed for the 1s (Formula presented.) 2s1/2 and (Formula presented.) (M1 + parity–violating–E1) transitions in hydrogen- and lithium-like ions, respectively. In particular, we focus on the difference between the excitation rates obtained for the right- and left-circularly polarized incident light. This difference arises due to the parity violating mixing of ionic levels and is usually characterized in terms of the circular–dichroism parameter. We argue that future measurements of circular dichroism, performed with highly charged ions in the SPS or LHC rings, may provide valuable information on the electron–nucleus weak–interaction coupling.
AB - A theoretical study of photoexcitation of highly charged ions from their ground states, a process which can be realized at the Gamma Factory at CERN, is presented. Special attention is paid to the question of how the excitation rates are affected by the mixing of opposite-parity ionic levels, which is induced both by an external electric field and the weak interaction between electrons and the nucleus. In order to reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on the developed approach, detailed calculations are performed for the 1s (Formula presented.) 2s1/2 and (Formula presented.) (M1 + parity–violating–E1) transitions in hydrogen- and lithium-like ions, respectively. In particular, we focus on the difference between the excitation rates obtained for the right- and left-circularly polarized incident light. This difference arises due to the parity violating mixing of ionic levels and is usually characterized in terms of the circular–dichroism parameter. We argue that future measurements of circular dichroism, performed with highly charged ions in the SPS or LHC rings, may provide valuable information on the electron–nucleus weak–interaction coupling.
KW - atomic parity violation
KW - circular dichroism
KW - partially stripped ions
KW - photoexcitation
UR - http://www.scopus.com/inward/record.url?scp=85124041800&partnerID=8YFLogxK
U2 - 10.1002/andp.202100561
DO - 10.1002/andp.202100561
M3 - Article
AN - SCOPUS:85124041800
VL - 534
JO - Annalen der Physik
JF - Annalen der Physik
SN - 0003-3804
IS - 3
M1 - 2100561
ER -