2022/02/01 by J. Hussels, N. Hölsch, Nicolas Hölsch +11
Chemistry · Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Atomic physics #Bond-dissociation energy #Chemistry #Dissociation (chemistry) #Excitation #Ion #Ionization #Laser-induced spectroscopy and plasma #Molecule #Photon #Photon energy #Physics #Quantum mechanics #physics.atom-ph
paper · pdf · doi:10.1103/physreva.105.022820
9 pages, 6 figures, Phys. Rev. A, accepted
arxiv created 2022/02/01 · openalex publication_date 2022/02/22 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The ionization energy of D2 has been determined experimentally from measurements involving two-photon Doppler-free vacuum-ultraviolet pulsed laser excitation and near-infrared continuous-wave laser excitation to yield EI(D2)=124 745.393 739(26) \wn. From this value, the dissociation energy of D2 is deduced to be D0(D2) = 36 748.362 282(26) \wn, representing a 25-fold improvement over previous values, and found in good agreement (at 1.6σ) with recent ab initio calculations of the 4-particle nonadiabatic relativistic energy and of quantum-electrodynamic corrections up to order mα6. This result constitutes a test of quantum electrodynamics in the molecular domain, while a perspective is opened to determine nuclear charge radii from molecules.