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Neon dimer


Gas phase ion energetics data

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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: Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

IE (eV) Method Reference
20.33 ± 0.08PETrevor, Pollard, et al., 1984

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
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 (20)Ne2
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
M (0u+) (166580) [30] 1 H (10) 2        M larrow X 166590 1 H
Tanaka and Yoshino, 1972
L (0u-) (166362) [70] 1 H (7.5) 3        (L larrow X) (V 166390 1 H
Tanaka and Yoshino, 1972
K (0u+) (165750) [50] 1 H (10) 4        K larrow X V 165770 1 H
Tanaka and Yoshino, 1972
J (1u) (164220) [190] 1 5        J larrow X 164310 1
Tanaka and Yoshino, 1972
Diffuse unclassified bands 162940 - 164040 cm-1, correlated to 1S + states derived from 2p5 4p.
Tanaka and Yoshino, 1972
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
I (161950) [79] 1 H 6        I larrow X 161980 1 H
Tanaka and Yoshino, 1972
H (0u+) (160322) [201] 1 H (7) 7        H larrow X V 160415 1 H
missing citation
G (0u+) (160233) [213] 1 H (9.3) 8        G larrow X V 160344 1 H
missing citation
F (0u+) (159347) [60] 1 H (7.5) 9        F larrow X V 159370 1 H
missing citation
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
E (0u-) (159135) [80] 1 H (10) 10        E larrow X V 159170 1 H
missing citation
D (0u+) (158635) [60] 1 H (10) 11        D larrow X V 158660 1 H
missing citation
C (1u) (156480) [290] 1 (10) 12        C larrow X (V) 156620 1
missing citation
Diffuse unclassified bands 150400 - 153600 cm-1, correltaed to 1S + states derived from 2p5 3p.
Tanaka and Yoshino, 1972
Theoretical potential functions, vibrational levels, and lifetimes for states derived from 1S + 2p5 3s 1,3P are given by Cohen and Schneider, 1974 .
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
(1u) (135900) 13           
missing citation
B (0u+) (135761) [58] 1 H 14         B larrow X V 135778 1 H
missing citation
(1u) (134500) 15           
missing citation
A 1Sigmau+ (0u+) (133800) [176] 1 H 16 17        A larrow X V 133899 1 H
missing citation
Continuous emission with maxima at 134400 cm-1 ("first continuum") and 121200 cm-1 18 ("second continuum")
missing citation
a 3Sigmau+Not observed in absorption from the ground state, but tentatively assigned as lower state of an absorption at 12270 cm-1 in Ne (200 - 1060 torr) excited by high-current short-duration electron bursts froma Febetron source Oka, Rao, et al., 1974; lifetime tau ~ 6.62 mus.
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X 1Sigmag+ 0 [13.7] 19 H   [0.17] (0.06)    3.15  

Notes

1Lowest observed level and interval DeltaG(v+1/2); the first observed band may not have v'=0.
2Progr. of three b.21 converging to 1S + 5s'[1/2]1.
3Progr. of four b.21 converging to 1S + 5s'[1/2]0.
4Progr. of five b. converging to 1S + 5s[3/2]1.
5Progr. of nine b.22 converging to 1S + 5s[3/2]2.
6Progr. of five b.23 converging to 1S + 3d'[3/2]1.
7Progr. of eight b.24 converging to 1S + 3d[1/2]1.25
8Progr. of eight b.24 converging to 1S + 3d[3/2]1.
9Progr. of four b. converging to 1S + 4s'[1/2]1.
10Progr. of four b. converging to 1S + 4s'[1/2]0.
11Progr. of three b. converging to 1S + 4s[3/2]1.
12Progr. of ten b.26 converging to 1S + 4s[3/2]2.
13Unstable; responsible for broadening to shorter wavelengths of the resonance line at 735.9 Å
14Only two levels 24 observed, correlated to 1S + 3s'[1/2]1. 25
15Unstable; responsible for broadening to shorter wavelengths of the resonance line at 743.7 Å
16DeltaG(v+3/2) = 93, DeltaG(v+5/2) = 40.
17Progr. of four b. 24 converging to 1S + 3s[3/2]1. 25
18Attributed to A rarrow X Tanaka and Yoshino, 1972, possibly also contributions from a rarrow X.
19Zero-point energy 12.3 cm-1 [see LeRoy, Klein, et al., 1974].
20From DeltaG"(1/2) observed in the VUV absorption spectrum Tanaka and Yoshino, 1972 and the binding energy of v=1 Tanaka, Yoshino, et al., 1973 as corrected by LeRoy, Klein, et al., 1974. LeRoy, Klein, et al., 1974 recommend De0 = 28.6 cm-1 (0.00355 eV) LeRoy, Klein, et al., 1974, a value derived from solid-state data Goldman and Klein, 1973 and in fair agreement with the Ne-Ne scattering data of Siska, Parson, et al., 1971 and Farrar, Lee, et al., 1973 [De0= 3l.9 cm-1 Siska, Parson, et al., 1971 and De0= 29.7 cm-1 Farrar, Lee, et al., 1973, respectively] and the ab initio calculations of Gordon and Kim, 1972 and Stevens, Wahl, et al., 1974 [De0= 28.2 cm-1 Gordon and Kim, 1972 and De0= 27.2 cm-1 Stevens, Wahl, et al., 1974, respectively]; see also Nain, Aziz, et al., 1976 who give De0= 30.2 cm-1 Nain, Aziz, et al., 1976.
21It is not certain that these two progressions belong to two separate electronic states.
22All bands are very diffuse.
23Irregular intervals and intensities; tentative classification.
24Rotational structure partially resolved.
25Also weaker progression with v" = 1.
26Diffuse bands.

References

Go To: Top, Gas phase ion energetics data, 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.

Trevor, Pollard, et al., 1984
Trevor, D.J.; Pollard, J.E.; Brewer, W.D.; Southworth, S.H.; Truesdale, C.M.; Shirley, D.A.; Lee, Y.T., Photoionization mass spectrometry of Ne dimers, J. Chem. Phys., 1984, 80, 6083. [all data]

Tanaka and Yoshino, 1972
Tanaka, Y.; Yoshino, K., Absorption spectra of Ne2 and HeNe molecules in the vacuum-UV region, J. Chem. Phys., 1972, 57, 2964. [all data]

Cohen and Schneider, 1974
Cohen, J.S.; Schneider, B., Ground and excited states of Ne2 and Ne2+. I. Potential curves with and without spin-orbit coupling, J. Chem. Phys., 1974, 61, 3230. [all data]

Oka, Rao, et al., 1974
Oka, T.; Rao, K.V.S.R.; Redpath, J.L.; Firestone, R.F., Mechanism for decay and spontaneous radiative decay constants of the lowest-lying attractive excited states of Ne2, Ar2, and Kr2, J. Chem. Phys., 1974, 61, 4740. [all data]

LeRoy, Klein, et al., 1974
LeRoy, R.J.; Klein, M.L.; McGee, I.J., On the dissociation energy and interaction potential of ground-state Ne2, Mol. Phys., 1974, 28, 587. [all data]

Tanaka, Yoshino, et al., 1973
Tanaka, Y.; Yoshino, K.; Freeman, D.E., On the determination of the ground state potential energy of Ne2 from its vacuum ultraviolet spectrum, J. Chem. Phys., 1973, 59, 564. [all data]

Goldman and Klein, 1973
Goldman, V.V.; Klein, M.L., An interatomic potential for Ne2 derived from solid state data, J. Low Temp. Phys., 1973, 12, 101. [all data]

Siska, Parson, et al., 1971
Siska, P.E.; Parson, J.M.; Schafer, T.P.; Lee, Y.T., Intermolecular potentials from crossed beam differential elastic scattering measurements. III. He + He and Ne + Ne, J. Chem. Phys., 1971, 55, 5762. [all data]

Farrar, Lee, et al., 1973
Farrar, J.M.; Lee, Y.T.; Goldman, V.V.; Klein, M.L., Neon interatomic potentials from scattering data and crystalline properties, Chem. Phys. Lett., 1973, 19, 359. [all data]

Gordon and Kim, 1972
Gordon, R.G.; Kim, Y.S., Theory for the forces between closed-shell atoms and molecules, J. Chem. Phys., 1972, 56, 3122. [all data]

Stevens, Wahl, et al., 1974
Stevens, W.J.; Wahl, A.C.; Gardner, M.A.; Karo, A.M., Ab initio calculation of the neon-neon 1«SIGMA»g+ potential at intermediate separations, J. Chem. Phys., 1974, 60, 2195. [all data]

Nain, Aziz, et al., 1976
Nain, V.P.S.; Aziz, R.A.; Jain, P.C.; Saxena, S.C., Interatomic potentials and transport properties for neon, argon, and krypton, J. Chem. Phys., 1976, 65, 3242. [all data]


Notes

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