Electric-quadrupole transition of H2 determined to 10-9 precision

被引：59

作者：

Cheng, C. -F. ^{[1
]}

Sun, Y. R. ^{[1
]}

Pan, H. ^{[1
]}

Wang, J. ^{[1
]}

Liu, A. -W. ^{[1
]}

Campargue, A. ^{[2
]}

Hu, S. -M. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[2] Univ Grenoble 1, CNRS, LIPhy UMR5588, F-38041 Grenoble, France

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 02期

关键词：

DISSOCIATION-ENERGIES; MOLECULAR-HYDROGEN; LINE POSITIONS; STRENGTHS;

D O I：

10.1103/PhysRevA.85.024501

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The S(3) electric-quadrupole transition of the (3-0) overtone of molecular hydrogen has been recorded with a continuous-wave cavity ring-down spectrometer and calibrated with sub-megahertz accuracy using a temperature-stabilized Fabry-Perot interferometer. The collision-induced frequency shift and the frequency at zero pressure limit are derived from a fit of the spectral profiles. The absolute transition frequency of the S(3) line is determined to be 376 531 818.1 MHz with a 1.6-MHz accuracy (delta nu/nu = 4 x 10(-9)) by measuring the shift to a Rb line at 795 nm. As the best determined transition frequency of neutral H-2 in the ground electronic state, this value agrees well with recent high-level quantum chemistry calculations including relativistic and quantum electrodynamics corrections.

引用

页数：4