Direct measurement of the ground-state dissociation energy of Na{sub 2}

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.54.R1006· OSTI ID:286652

Jones, K M; Maleki, S; Bize, S; Lett, P D; Williams, C J ^[1]; Richling, H; Knoeckel, H; Tiemann, E ^[2]; Wang, H; Gould, P L; Stwalley, W C ^[3]

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1. Atomic Physics Division, Phys. A-167, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
2. Institut fuer Atom- und Molekuelphysik, Universitaet Hannover, Appelstrasse 2, 30167 Hannover (Germany)
3. Department of Physics, U-46, University of Connecticut, Storrs, Connecticut 06269-3046 (United States)

We report a direct measurement of the Na{sub 2} {ital X}{sup 1}{Sigma}{sub {ital g}}{sup +} ground-state dissociation energy. Three spectroscopic measurements are combined to directly yield the energy of the lowest ({ital v}=0) vibrational level relative to the free-atom limit. The {ital X}{sup 1}{Sigma}{sub {ital g}}{sup +}({ital v}=0{r_arrow}31) splitting is measured by double-resonance spectroscopy; {ital X}{sup 1}{Sigma}{sup +}{sub {ital g}}({ital v}=31){r_arrow}{ital A}{sup 1}{Sigma}{sup +}{sub {ital u}}({ital v}{prime}=165) by laser-induced fluorescence; and free atoms{r_arrow}{ital A}{sup 1}{Sigma}{sub {ital u}}{sup +}({ital v}{sup {prime}}=165) by photoassociation of ultracold atoms. The result is {ital D}{sub 0}=5942.6880(49) cm{sup {minus}1}. The uncertainty is a factor of 6 improvement over a previous (indirect) determination. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 286652
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DIATOMIC MOLECULES
DISSOCIATION ENERGY
DOUBLE RESONANCE METHODS
FLUORESCENCE SPECTROSCOPY
GROUND STATES
ROTATIONAL STATES
SODIUM
VIBRATIONAL STATES