H. F. Beyer,
G. Menzel,
D. Liesen,
A. Gallus,
F. Bosch,
R. Deslattes,
P. Indelicato,
T. Stöhlker,
O. Klepper,
R. Moshammer,
F. Nolden,
H. Eickhoff,
B. Franzke,
and M. Steck
Measurement of the Ground-State Lambshift of Hydrogenlike Uranium at the Electron Cooler of the ESR
Z. Phys. D, 35 :169 (July 1995)
Measurement of the Ground-State Lambshift of Hydrogenlike Uranium at the Electron Cooler of the ESR
Z. Phys. D, 35 :169 (July 1995)
Abstract:
X-rays are emitted with the radiative recombination of free electrons in an electron cooler of a heavy-ion storage ring. Due to a small width of the X-ray lines, an observation angle close to 0 degrees and an accurate determination of the ion velocity, the ground-state Lambshift of hydrogenlike uranium (470 +/- 16) eV could be measured to an accuracy of 3.4%. A re-evaluation of a measurement of the 1S(1/2) Lambshift in hydrogenlike gold gave a new value of (202.3 +/- 7.9) eV as compared to the former value of (212 +/- 15) eV. The results are in excellent agreement with QED calculations and are more precise than any other measurements previously reported for a high-Z, hydrogenlike ion.