Observation of lifetime-limited X-ray linewidths in cold highly charged ions

被引：77

作者：

Beiersdorfer, P

Osterheld, AL

Decaux, V

Widmann, K

机构：

[1] Department of Physics and Space Technology, Lawrence Livermore National Laboratory, Livermore, CA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.77.5353

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature of Cs45+ ions interacting with a 7500-eV electron beam in an electron-beam ion trap was reduced to as low as 59.4 +/- 9.9 eV. This decoupling of the electron and ion energy greatly advances the achievable precision of spectral measurements and allowed the first observation of the lifetime-limited linewidth of an x-ray transition in a highly charged ion, enabling the measurement of a radiative lifetime in the femtosecond regime. Using the uncertainty principle, we infer 1.65(-0.05)(+0.24) fs for the lifetime of the upper level of the 3d(5/2) --> 2p(3/2) electric-dipole transition in the neonlike Cs ion.

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页码：5353 / 5356

页数：4

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