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Updated: Aug 15, 2026

Time-resolved ElectroSpray Ionization Hydrogen-deuterium Exchange Mass Spectrometry for Studying Protein Structure and Dynamics
Published on: April 17, 2017
Precise calculation of transition frequencies of hydrogen and deuterium based on a least-squares analysis
Ulrich D Jentschura1, Svetlana Kotochigova, Eric-Olivier Le Bigot
1National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8401, USA.
Abstract:
We combine a limited number of accurately measured transition frequencies in hydrogen and deuterium, recent quantum electrodynamics (QED) calculations, and, as an essential additional ingredient, a generalized least-squares analysis, to obtain precise and optimal predictions for hydrogen and deuterium transition frequencies. Some of the predicted transition frequencies have relative uncertainties more than an order of magnitude smaller than that of the g factor of the electron, which was previously the most accurate prediction of QED.
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