Separated oscillatory-field microwave measurement of the 2 3P1-2 3P2 fine-structure interval of atomic helium

被引：58
|
作者：
Borbely, J. S. [1 ]
George, M. C. [1 ]
Lombardi, L. D. [1 ]
Weel, M. [1 ]
Fitzakerley, D. W. [1 ]
Hessels, E. A. [1 ]
机构：
[1] York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada
来源：
PHYSICAL REVIEW A | 2009年 / 79卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
fine structure; helium neutral atoms; PRECISE MEASUREMENT; LAMB SHIFT; STATE;
D O I：
10.1103/PhysRevA.79.060503
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The 2 P-3(1)-2 P-3(2) interval in helium is measured using microwave separated oscillatory fields. Our measured result is 2 291 177.53 +/- 0.35 kHz . A disagreement with theory of over 15 kHz indicates a major problem with two-electron QED calculations. If this disagreement is resolved, measurements of both 2 P-3 fine-structure intervals at this accuracy would lead to a six-parts-per-billion determination of the fine-structure constant.
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页数：4
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