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TBe


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 9BeT
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Pir 20037.91 1 1322 2 16 2  4.192 0.068 -0.007 [1.66E-4] 3  1.3340 A rarrow X V 20045.83 4 Z
de Greef and Colin, 1974
X 2Sigma+ 0 1305 2 15 2  4.142 0.064 -0.006 [1.67E-4] 3  1.3420  

Notes

1See note n of BeH.
2From isotope relations. b omega'e- omega"e = 16.36, omega'ex'e-omega"ex"e = 0.84, omega'ey'e - omega"ey"e = -0.15.
3Additional Dv and higher order constants in de Greef and Colin, 1974.
4See note p of BeD.
5From the value for BeH.

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.

de Greef and Colin, 1974
de Greef, D.; Colin, R., The electronic isotope shift in the A2«PI»-X2«SIGMA»+ bands of BeH, BeD and BeT, J. Mol. Spectrosc., 1974, 53, 455. [all data]


Notes

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