Dissociation energy of the hydrogen molecule

Journal Article · Mon Apr 06 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.2149· OSTI ID:7286121

Balakrishnan, A; Smith, V; Stoicheff, B P ^[1]

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1. Department of Physics, Univeristy of Toronto, and Ontario Laser Lightwave Research Centre, Toronto, Ontario, M5S 1A7 (Canada)

Fluoresence-excitation spectroscopy near 84.5 nm has been used to measure the threshold for the dissociation limit of H{sub 2}({ital B}{prime} {sup 1}{sigma}{sub {ital u}}{sup +})=H(1{ital s})+H(2{ital s}) at 118 377.06{plus minus}0.04 cm{sup {minus}1}. This yields a value of {ital D}{sub 0}(H{sub 2})=36 118.11{plus minus}0.08 cm{sup {minus}1} for the dissociation energy of the ground electronic state {ital X}({sup 1}{Sigma}{sub {ital g}}{sup +}) of H{sub 2}, in agreement with the latest theoretical calculation which includes nonadiabatic, relativistic, and radiative corrections. When combined with recent determinations of the ionization energy of H{sub 2} the present {ital D}{sub 0}(H{sub 2}) leads to the value {ital D}{sub 0}H{sub 2}{sup +}=21 379.36{plus minus}0.08 cm{sup {minus}1}, also in good agreement with theoretical values.

• OSTI ID: 7286121
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:14; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CORRECTIONS
DATA
DISSOCIATION ENERGY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
EXTREME ULTRAVIOLET RADIATION
FLUORESCENCE
GROUND STATES
HYDROGEN
INFORMATION
IONIZATION POTENTIAL
LUMINESCENCE
NONMETALS
NUMERICAL DATA
RADIATIONS
RADIATIVE CORRECTIONS
SPECTRA
THRESHOLD ENERGY
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA