Precise Lamb Shift Measurements in Hydrogen-Like Heavy Ions - Status and Perspectives

被引：10

作者：

Andrianov, V. ^{[1
,2
,3
]}

Beckert, K. ^{[1
]}

Bleile, A. ^{[1
,3
]}

Chatterjee, Ch. ^{[1
]}

Echler, A. ^{[1
,3
]}

Egelhof, P. ^{[1
,3
]}

Gumberidze, A. ^{[1
]}

Ilieva, S. ^{[1
,3
]}

Kiselev, O. ^{[1
,3
]}

Kilbourne, C. ^{[4
]}

Kluge, H-J. ^{[1
]}

Kraft-Bermuth, S. ^{[1
,3
]}

McCammon, D. ^{[5
]}

Meier, J. P. ^{[1
,3
]}

Reuschl, R. ^{[1
]}

Stoehlker, T. ^{[1
]}

Trassinelli, M. ^{[1
]}

机构：

[1] Gesell Schwerionenforsch GSI, D-64291 Darmstadt, Germany

[2] Lomonosov Moscow State Univ, Moscow, Russia

[3] Johannes Gutenberg Univ Mainz, Mainz, Germany

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[5] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

LOW TEMPERATURE DETECTORS LTD 13 | 2009年 / 1185卷

关键词：

Calorimetric low temperature detectors for X-rays; Test of QED; SPECTROSCOPY;

D O I：

10.1063/1.3292459

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The precise determination of the energy of the Lyman alpha 1 and alpha 2 lines in hydrogen-like heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields. For the first time, a calorimetric low-temperature detector was applied in an experiment to precisely determine the transition energy of the Lyman lines of lead ions Pb-207(81+) at the Experimental Storage Ring (ESR) at GSI. The detectors consist of silicon thermistors, provided by the NASA/Goddard Space Flight Center, and Pb or Sn absorbers to obtain high quantum efficiency in the energy range of 40-80 keV, where the Doppler-shifted Lyman lines are located. The measured energy of the Lyman alpha 1 line, E(Ly-alpha 1, (207)pb(81+)) = (7793 +/- 12(stat) +/- 23(syst)) eV, agrees within errors with theoretical predictions. The systematic error is mainly due to uncertainties in the non-linear energy calibration of the detectors as well as the relative position of detector and gas-jet target.

引用

页码：99 / +

页数：2

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