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Exploring relativistic many-body recoil effects in highly charged ions
R Soria Orts1, Z Harman, J R Crespo López-Urrutia
1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Physical Review Letters
|October 10, 2006
Summary
The relativistic recoil effect in highly charged ions was measured using B- and Be-like Argon ions. Experimental isotope shifts confirm theoretical predictions, highlighting the importance of relativistic electron dynamics.
Area of Science:
- Atomic Physics
- Quantum Electrodynamics
- Spectroscopy
Background:
- The relativistic recoil effect is crucial for understanding atomic structure and spectra.
- Highly charged ions provide a unique laboratory to study relativistic effects due to their large nuclear charge.
Purpose of the Study:
- To experimentally investigate the relativistic recoil effect in B- and Be-like Argon ions.
- To measure isotope shifts and extract the recoil contribution to magnetic-dipole (M1) transitions.
- To compare experimental results with theoretical predictions.
Main Methods:
- Utilized the Heidelberg electron beam ion trap for experiments with highly charged ions.
- Measured isotope shifts of Argon-36 versus Argon-40 with sub-parts-per-million accuracy.
- Analyzed M1 transitions in Ar13+ and Ar14+ to isolate the recoil effect.
Main Results:
- Experimental isotope shifts for Ar13+ and Ar14+ were determined to be 0.00123(6) nm and 0.00120(10) nm, respectively.
- These experimental values closely match theoretical predictions of 0.00123(5) nm (Ar13+) and 0.00122(5) nm (Ar14+).
- The agreement validates the theoretical model incorporating the total relativistic recoil operator.
Conclusions:
- The study confirms the significant contribution of the relativistic recoil effect in highly charged ions.
- Accurate measurements of isotope shifts are essential for probing electron dynamics.
- A comprehensive understanding of correlated relativistic electron dynamics is necessary even for intermediate nuclear charges.
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