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Beryllium


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 April, 1976

Symbols used in the table of constants
SymbolMeaning
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 9Be2
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A (1Sigmau+)  502 1 6.8        A larrow X 28551 1
Brom, Hewett, et al., 1975
  483 2 4.5        A larrow X 27670 2
Brom, Hewett, et al., 1975
X 1Sigmag+Theoretical calculations give no evidence for a bound ground state Bender and Davidson, 1967.

Notes

1In Ne matrix at 4 K.
2In Ar matrix at 4 K.

References

Go To: Top, Constants of diatomic molecules, Notes

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

Brom, Hewett, et al., 1975
Brom, J.M., Jr.; Hewett, W.D., Jr.; Weltner, W., Jr., Optical spectra of Be atoms and Be2 molecules in rare gas matrices, J. Chem. Phys., 1975, 62, 3122. [all data]

Bender and Davidson, 1967
Bender, C.F.; Davidson, E.R., Theoretical calculation of the potential curves of the Be2 molecule, J. Chem. Phys., 1967, 47, 4972. [all data]


Notes

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