Relativistic and QED Effects in the Fundamental Vibration of T2

T. Madhu Trivikram*, M. Schlösser, W. Ubachs, E. J. Salumbides

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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The hydrogen molecule has become a test ground for quantum electrodynamical calculations in molecules. Expanding beyond studies on stable hydrogenic species to the heavier radioactive tritium-bearing molecules, we report on a measurement of the fundamental T2 vibrational splitting (v=0→1) for J=0-5 rotational levels. Precision frequency metrology is performed with high-resolution coherent anti-Stokes Raman spectroscopy at an experimental uncertainty of 10-12 MHz, where sub-Doppler saturation features are exploited for the strongest transition. The achieved accuracy corresponds to a 50-fold improvement over a previous measurement, and it allows for the extraction of relativistic and QED contributions to T2 transition energies.

Original languageEnglish
Article number163002
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Issue number16
Early online date16 Apr 2018
Publication statusPublished - 20 Apr 2018


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