Improved Ionization and Dissociation Energies of the Deuterium Molecule

Abstract

The ionization energy of D${}_2$ 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 $E_{\mathrm{I}}({\mathrm{D}}_2)=124745.393739(26)$ \wn. From this value, the dissociation energy of D${}_2$ is deduced to be $D_0$(D${}_2$) = 36\,748.362\,282(26) \wn, representing a 25-fold improvement over previous values, and found in good agreement (at $1.6\sigma$) with recent ab initio calculations of the 4-particle nonadiabatic relativistic energy and of quantum-electrodynamic corrections up to order $m{\alpha }^6$. This result constitutes a test of quantum electrodynamics in the molecular domain, while a perspective is opened to determine nuclear charge radii from molecules.

arXiv comment9 pages, 6 figures, Phys. Rev. A, accepted

References in corpus (16)

• Improved Measurement of the Hydrogen 1S - 2S Transition Frequency
• Proton-Electron Mass Ratio from Laser Spectroscopy of HD${}^{+}$ at the Part-Per-Trillion Level
• Born-Oppenheimer potential for H${}_2$
• Fundamental transitions and ionization energies of the hydrogen molecular ions at the few ppt level
• Benchmarking theory with an improved measurement of the ionization and dissociation energies of H${}_2$
• Nonadiabatic QED correction to the dissociation energy of the hydrogen molecule
• Theory of the Lamb shift in hydrogen and light hydrogen-like ions
• Dissociation energy of the hydrogen molecule at 10${}^{-9}$ accuracy
• Relativistic corrections for the ground electronic state of molecular hydrogen
• Schrödinger equation solved for the hydrogen molecule with unprecedented accuracy
• Dissociation Energy of Molecular Hydrogen Isotopologues
• Trapping, cooling, and photodissociation analysis of state-selected H$\_2^{+}$ ions produced by (3+1) multiphoton ionization
• Elimination of the Translational Kinetic Energy Contamination in pre-Born-Oppenheimer Calculations
• Hyperfine components of all rovibrational quadrupole transitions in the H${}_2$ and D${}_2$ molecules
• Accurate Born-Oppenheimer potentials for excited ${\Sigma }^{+}$ states of the hydrogen molecule
• Chirp-compensated pulsed titanium-sapphire laser system for precision spectroscopy

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• Intensity-dependent precision two-photon Doppler-free spectroscopy of Xe using narrow-bandwidth long-pulse deep-UV laser radiation