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BrXe


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 November, 1977

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 (132)Xe(79)Br
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
B (2Sigma+) 36010 1 120 (0.23)       (2.96) B lrarrow X 2 
Velazco and Setser, 1975; Brau and Ewing, 1975; Tellinghuisen, Hays, et al., 1976
Braod unclassified emission bands at 21500 and 28300 cm-1. 3
Velazco and Setser, 1975; Brau and Ewing, 1975; Tellinghuisen, Hays, et al., 1976
X (2Sigma+) 0 4           
Velazco and Setser, 1975; Brau and Ewing, 1975

Notes

1Energy of the potential minimum relative Xe(1S) + Br(2P3/2). All constants derived Tellinghuisen, Hays, et al., 1976 by trial-and-error matching of observed and theoretically simulated spectra.
2Structured continuum with principal peak at 35480 cm-1, observed in emission in the reaction of metastable (3P2) Xe atoms with Br2, CH2Br2, and PBr3 at ~ 1 torr Velazco and Setser, 1975, Golde, 1975 or on electron bombardment of Ar-Xe-Br2 or Xe-HBr mixtures at pressures of the order of 1 atm Brau and Ewing, 1975, Tellinghuisen, Hays, et al., 1976. Under the latter conditions laser action has been found Searles and Hart, 1975, Tellinghuisen, Hays, et al., 1976. Observed in absorption in an Ar matrix at 34000 cm-1 Ault and Andrews, 1976.
3 Ault and Andrews, 1976 report emission peaks in argon matrices at 21200 and 26700 cm-1.
4Repulsive state with van der Waals minimum of unknown depth.

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.

Velazco and Setser, 1975
Velazco, J.E.; Setser, D.W., Bound-free emission spectra of diatomic xenon halides, J. Chem. Phys., 1975, 62, 1990. [all data]

Brau and Ewing, 1975
Brau, C.A.; Ewing, J.J., Emission spectra of XeBr, XeCl, XeF, and KrF, J. Chem. Phys., 1975, 63, 4640. [all data]

Tellinghuisen, Hays, et al., 1976
Tellinghuisen, J.; Hays, A.K.; Hoffman, J.M.; Tisone, G.C., Spectroscopic studies of diatomic noble gas halides. II. Analysis of bound-free emission from XeBr, XeI, and KrF, J. Chem. Phys., 1976, 65, 4473. [all data]

Golde, 1975
Golde, M.F., Interpretation of the oscillatory spectra of the inert-gas halides, J. Mol. Spectrosc., 1975, 58, 261. [all data]

Searles and Hart, 1975
Searles, S.K.; Hart, G.A., Stimulated emission at 281.8 nm from XeBr, Appl. Phys. Lett., 1975, 27, 243. [all data]

Ault and Andrews, 1976
Ault, B.S.; Andrews, L., Absorption and emission spectra of matrix-isolated XeF, KrF, XeCl, and XeBr, J. Chem. Phys., 1976, 65, 4192. [all data]


Notes

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