Details

Autor(en) / Beteiligte

• Cheng, C-F
• Hussels, J
• Niu, M
• Bethlem, H L
• Eikema, K S E
• Salumbides, E J
• Ubachs, W
• Beyer, M
• Hölsch, N
• Agner, J A
• Merkt, F
• Tao, L-G
• Hu, S-M
• Jungen, Ch

Titel

Dissociation Energy of the Hydrogen Molecule at 10^{-9} Accuracy

Ist Teil von

• Physical review letters, 2018-07, Vol.121 (1), p.013001-013001

Ort / Verlag

United States

Erscheinungsjahr

2018

Quelle

American Physical Society

Beschreibungen/Notizen

• 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.