Uranium monoxide

Constants of diatomic molecules

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through June, 1975

Symbols used in the table of constants
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 238U16O
Very weak band structure in emission from an arc; no measurements.
Gatterer, Junkes, et al., 1957
X [820.0] 1           


1IR spectrum of U16O in Ar matrix at 15 K Carstens, Gruen, et al., 1972, Gabelnick, Reedy, et al., 1973. For U18O at 776.3 cm-1. Derived constants for U16O are omegae = 825.0, omegaexe = 2.5.
2Thermochemical value (mass-spectrometry) Drowart, Pattoret, et al., 1967, Coppens, Smoes, et al., 1968, Pattoret, Drowart, et al., 1967.
3Electron impact appearance potential, average of two values Mann, 1964, Rauh and Ackermann, 1974.


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Gatterer, Junkes, et al., 1957
Gatterer, A.; Junkes, J.; Salpeter, E.W., Molecular spectra of metallic oxides, Specola Vaticana, Citta del Vaticano, 1957, 0. [all data]

Carstens, Gruen, et al., 1972
Carstens, D.H.W.; Gruen, D.M.; Kozlowski, J.F., Vibrational spectra of chemically sputtered uranium oxide molecules isolated in noble gas matrices, High Temp. Sci., 1972, 4, 436. [all data]

Gabelnick, Reedy, et al., 1973
Gabelnick, S.D.; Reedy, G.T.; Chasanov, M.G., The infrared spectrum of matrix-isolated uranium oxide vapor species, Chem. Phys. Lett., 1973, 19, 90. [all data]

Drowart, Pattoret, et al., 1967
Drowart, J.; Pattoret, A.; Smoes, S., Mass spectrometric studies of the vaporization of refractory compounds, Proc. Br. Ceram. Soc., 1967, 8, 67. [all data]

Coppens, Smoes, et al., 1968
Coppens, P.; Smoes, S.; Drowart, J., Mass spectrometric determination of the dissociation energy of the molecule BO, Trans. Faraday Soc., 1968, 64, 630. [all data]

Pattoret, Drowart, et al., 1967
Pattoret, A.; Drowart, J.; Smoes, S., Etudes thermodynamiques par spectrometrie de masse sur le systeme uranium-oxygene in Thermodynamics of nuclear materials (Proc. Symp. Thermodynamics, Vienna 1967), Publ. IAEA, Vienna, 1967, 613-636. [all data]

Mann, 1964
Mann, J.B., Ionization of U, UO, and UO2 by electron impact, J. Chem. Phys., 1964, 40, 1632. [all data]

Rauh and Ackermann, 1974
Rauh, E.G.; Ackermann, R.J., First ionization potentials of some refractory oxide vapors, J. Chem. Phys., 1974, 60, 1396. [all data]


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