Dissociation Energy of the Hydrogen Molecule at 10−9 Accuracy
| Autor: | Maximilian Beyer, Nicolas Hölsch, Edcel J. Salumbides, Ch. Jungen, Frédéric Merkt, Josef A. Agner, M. L. Niu, Kjeld S. E. Eikema, Wim Ubachs, J. Hussels, Hendrick L. Bethlem, L.-G. Tao, S.-M. Hu, C.-F. Cheng |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 121 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.121.013001 |
| Popis: | The ionization energy of ortho-H_{2} has been determined to be E_{I}^{o}(H_{2})/(hc)=124 357.238 062(25) cm^{-1} from measurements of the GK(1,1)-X(0,1) interval by Doppler-free, two-photon spectroscopy using a narrow band 179-nm laser source and the ionization energy of the GK(1,1) state by continuous-wave, near-infrared laser spectroscopy. E_{I}^{o}(H_{2}) was used to derive the dissociation energy of H_{2}, D_{0}^{N=1}(H_{2}), at 35 999.582 894(25) cm^{-1} with a precision that is more than one order of magnitude better than all previous results. The new result challenges calculations of this quantity and represents a benchmark value for future relativistic and QED calculations of molecular energies. |
| Databáze: | OpenAIRE |
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