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Nitrogen anion


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 May, 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 14N2-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Theoretical calculations of N2- states Thulstrup and Andersen, 1975.
Additional resonances in electron scattering at higher energies, several of them assiciated with the lowest N2 Rydberg states which derive from A 2Piu of N2+.
Mazeau, Hall, et al., 1973; Schulz, 1973; Golden, Burns, et al., 1974
E 2Sigmag+ (77150) 1 (2180) 1 (16) 1       1.115 1  
Comer and Read, 1971
Two long progressions of shape resonances in electron scattering at 8.2 - 9.6 and 9.0 - 11.2 eV above X 1Sigmag+ (v=0) of N2. They correspond to negative ion formation with subsequent decay to A 3Sigmau+ and B 3Pig, respectively, of neutral N2.
Sanche and Schulz, 1972; Mazeau, Gresteau, et al., 1973; Schulz, 1973
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X 2Pig 0d (1968) 2 3 (10) 2       1.193 2  
Brailsford, Morton, et al., 1969

Notes

1Molecular constants estimated by Comer and Read, 1971 from a short progression of three very sharp resonances in electron scattering at 11.48, 11.75, 12.02 eV above X 1Sigmag+(v=0) of N2. The parent is the E 3Sigmag+ Rydberg state of N2, the grandparent X 2Sigmag+(v=0) of N2+.
2Ground state constants derived by Birtwistle and Herzenberg, 1971 from a comparison of experimental with calculated cross sections for the vibrational excitation of N2 by resonance scattering of electrons in the 2-4 eV region. The vibrational levels have a considerable width owing to preionization, but the width parameter Gamma decreases rapidly with increasing r from 0.57 eV at re(N2).
3 Holzer, Murphy, et al., 1969 observe DeltaG(1/2) ~ 1840 Holzer, Murphy, et al., 1969 for N2- in potassium halide single crystals.
4From D00(N2) and the e1ectron affinities of N2 and N, assuming for the latter -0.07 eV as given by Hotop and Lineberger, 1975.
5From the energy difference (corrected for zero-point energy) of the potential minima given by Birtwistle and Herzenberg, 1971; see 2.
6The minimum of the ground state potential function lies 1.925 eV above that of N2 Birtwistle and Herzenberg, 1971; see 2.
7Spectrum of N2- in potassium halides, confirming the 2Pi nature of the ground state.

References

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

Thulstrup and Andersen, 1975
Thulstrup, E.W.; Andersen, A., Configuration interaction studies of bound, low-lying states of N2-, N2, N2+ and N22+, J. Phys. B:, 1975, 8, 965. [all data]

Mazeau, Hall, et al., 1973
Mazeau, J.; Hall, R.I.; Joyez, G.; Landau, M.; Reinhardt, J., Electron exitation of N2. II. Resonant phenomena associated with Rydberg states, J. Phys. B:, 1973, 6, 873. [all data]

Schulz, 1973
Schulz, G.J., Resonances in electron impact on diatomic molecules, Rev. Mod. Phys., 1973, 45, 423. [all data]

Golden, Burns, et al., 1974
Golden, D.E.; Burns, D.J.; Sutcliffe, V.C., Jr., Role of resonances in the electron-impact excitation functions of the C3«PI»u and E3«SIGMA»g+ states of N2, Phys. Rev. A: Gen. Phys., 1974, 10, 2123. [all data]

Comer and Read, 1971
Comer, J.; Read, F.H., Electron impact studies of a resonant state of N2-, J. Phys. B:, 1971, 4, 1055. [all data]

Sanche and Schulz, 1972
Sanche, L.; Schulz, G.J., Electron transmission spectroscopy: core-excited resonances in diatomic molecules, Phys. Rev. A: Gen. Phys., 1972, 6, 69. [all data]

Mazeau, Gresteau, et al., 1973
Mazeau, J.; Gresteau, F.; Hall, R.I.; Joyez, G.; Reinhardt, J., Electron impact excitation of N2. I. Resonant phenomena associated with the A3«SIGMA»u+ and B3«PI»g valence states, J. Phys. B:, 1973, 6, 862. [all data]

Brailsford, Morton, et al., 1969
Brailsford, J.R.; Morton, J.R.; Vannotti, L.E., Electron spin resonance spectrum of N2- trapped in KCl, KBr, and KI, J. Chem. Phys., 1969, 50, 1051. [all data]

Birtwistle and Herzenberg, 1971
Birtwistle, D.T.; Herzenberg, A., Vibrational excitation of N2 by resonance scattering of electrons, J. Phys. B:, 1971, 4, 53. [all data]

Holzer, Murphy, et al., 1969
Holzer, W.; Murphy, W.F.; Bernstein, H.J., Raman spectra of negative molecular ions doped in alkali halide crystals, J. Mol. Spectrosc., 1969, 32, 13. [all data]

Hotop and Lineberger, 1975
Hotop, H.; Lineberger, W.C., Binding energies of atomic negative ions, J. Phys. Chem. Ref. Data, 1975, 4, 539. [all data]


Notes

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