Electric-quadrupole transition of H2 determined to 109 precision

C.-F. Cheng (程存峰), Y. R. Sun (孙羽), H. Pan (潘虎), J. Wang (王进), A.-W. Liu (刘安雯), A. Campargue, and S.-M. Hu (胡水明)
Phys. Rev. A 85, 024501 – Published 6 February 2012

Abstract

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-Pérot 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 (δν/ν=4×109) by measuring the shift to a Rb line at 795 nm. As the best determined transition frequency of neutral H2 in the ground electronic state, this value agrees well with recent high-level quantum chemistry calculations including relativistic and quantum electrodynamics corrections.

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  • Received 9 January 2012

DOI:https://doi.org/10.1103/PhysRevA.85.024501

©2012 American Physical Society

Authors & Affiliations

C.-F. Cheng (程存峰)1, Y. R. Sun (孙羽)1, H. Pan (潘虎)1, J. Wang (王进)1, A.-W. Liu (刘安雯)1, A. Campargue2, and S.-M. Hu (胡水明)1,*

  • 1Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
  • 2Université Grenoble 1/CNRS, UMR5588 LIPhy, Grenoble F-38041, France

  • *smhu@ustc.edu.cn

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Vol. 85, Iss. 2 — February 2012

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