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Neon, compound with xenon (1:1)

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 March, 1977

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 (20)Ne(132)Xe
X 1Sigma+ 0 [(17.5)] 1        3.745 2 3  
Marteau, Granier, et al., 1967


1Theoretical values Bobetic and Barker, 1976; the ground state potentials support five or possibly six (NeXe) bound vibrational levels.
2From crossed beam differential scattering measurements Ng, Lee, et al., 1974.
3Translational sp.
4The splittings between X1 and X2 and between A2 and A3 are very similar to those of the 2P ground states of Kr+ (5371 cm-1) or Xe+ (10537 cm-1) and Ne+ (780 cm-1). The splitting between A1 and A2 is molecular in nature; both states arise from 2P3/2 of Ne+. The corresponding splitting in the ground state is not resolved.
5The transition energy A2 - X1 is close to the difference between the ionization potentials of Ne and Kr or Xe, i.e. 61015 or 76096 cm-1. This agreement together with that mentioned in 4 makes the interpretation by Tanaka, Yoshino, et al., 1975 of the observed spectra as charge transfer spectra very convincing.


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

Marteau, Granier, et al., 1967
Marteau, P.; Granier, R.; Vu, H.; Vodar, B., Spectres de translation des couples Xe-He, Xe-Ne, Xe-Ar et Xe-H2; leur role possible dans la formation des bandes < satellites > electroniques, C.R. Acad. Sci. Paris, Ser. B, 1967, 265, 685. [all data]

Bobetic and Barker, 1976
Bobetic, M.V.; Barker, J.A., Vibrational levels of heteronuclear rare gas van der Waals molecules, J. Chem. Phys., 1976, 64, 2367-2369. [all data]

Ng, Lee, et al., 1974
Ng, C.Y.; Lee, Y.T.; Barker, J.A., Improved potentials for Ne + Ar, Ne + Kr, and Ne + Xe, J. Chem. Phys., 1974, 61, 1996. [all data]

Tanaka, Yoshino, et al., 1975
Tanaka, Y.; Yoshino, K.; Freeman, D.E., Emission spectra of heteronuclear diatomic rare gas positive ions, J. Chem. Phys., 1975, 62, 4484. [all data]


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