Frequency shift of hyperfine transitions due to blackbody radiation

被引：57

作者：

Angstmann, E. J. ^{[1
]}

Dzuba, V. A. ^{[1
]}

Flambaum, V. V. ^{[1
]}

机构：

[1] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW A | 2006年 / 74卷 / 02期

关键词：

DIPOLE POLARIZABILITIES; PERTURBATION-THEORY; ENERGY-LEVELS; CESIUM; AMPLITUDES; ATOMS;

D O I：

10.1103/PhysRevA.74.023405

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have performed calculations of the size of the frequency shift induced by a static electric field on the clock transition frequencies of the hyperfine splitting in Yb+, Rb, Cs, Ba+, and Hg+. The calculations are used to find the frequency shifts due to blackbody radiation which are needed for accurate frequency measurements and improvements of the limits on variation of the fine-structure constant alpha. Our result for Cs [delta nu/E-2=-2.26(2)x10(-10)Hz/(V/m)(2)] is in good agreement with early measurements and ab initio calculations. We present arguments against recent claims that the actual value might be smaller. The difference (similar to 10%) is due to the contribution of the continuum spectrum in the sum over intermediate states.

引用

页数：8

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