Excitation of N2 and N+2 systems by electrons—II. Excitation cross sections and N21PG low pressure afterglow

Shemansky, D. E.; Broadfoot, A. L.

doi:10.1016/0022-4073(71)90106-3

Cited by 83 publications

(21 citation statements)

References 43 publications

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“…Uncertainty in Jeunehormne's measurement:s are at>out: 1'7~; Ho11st:e:1n' s are uncen.a:1n t>y 5%. A Des1andres array of Einstein A coefficients for B-A bands is given by Shemansky and Broadfoot[572], in general agreement with these measured lifetimes (table 96). Estimates by Wentink !:.!.…”

supporting

confidence: 66%

“….1610-07 A-values from Shemansky and Broadfoot [572], and Johnson and Fowler [362] , are not always in agreement. …”

mentioning

confidence: 88%

“…Shemanskv and Broadfoot [572] have used the same intensitv da.ta to calculat.e absolute va1ues of Einstein A coeffi~ients. Thev used the lifetime measurement of Bennett and Dalby [73], but also llsed unreliable r-centroids of \iV all ace and Nichol1s [ Comparison of the fits both with and without the lifetimes for the v' = 10 level gives a further measure of confidence in the estimate of the lifetimes of the unobserved v' =0, 9 levels.…”

Section: O Aiitg-x1l:g+mentioning

confidence: 99%

“…The relative band strengths of Jain amI Sahni should be used to get the A coefficients. Rescaled absolute A values are given in table 95, e. N2+A2IIu-X2I:g+ A. LOFTHUS AND P. H. KRlIPENIE· Shemansky and Broadfoot[572] have studied transition probabilities for several transitions in N 2 and N 2 +. The results for the A-X Meinel bands are uncertain.…”

mentioning

confidence: 99%

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The spectrum of molecular nitrogen

Lofthus¹,

Krupenie²

1977

Journal of Physical and Chemical Reference Data

1,547

808

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This is a critical review and compilation of the observed and pre dieted spectroscopic data on the molecule N2 and its ions N2-, N2+, N 22+, and the molecule N 3' Each electronic band system is discussed in detail, and tables of band origins and heads are given. In addition to the gas phase electronic, electron and Raman spectra, there are also examined the spectra of condensed molecular nitrogen as well as the pressure-and field-induced infrared and microwave absorption. Dissociation energy of N2J predissociations, and perturbations arc discussed. Potential energy curves are given, as well as radiative lifetimes, .f-values, and Franck-Condon integrals. Molecular constants are listed for the known electronic states. Electronic structure and theoretical calcull;Ltions are reviewed.

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supporting

confidence: 66%

“….1610-07 A-values from Shemansky and Broadfoot [572], and Johnson and Fowler [362] , are not always in agreement. …”

mentioning

confidence: 88%

Section: O Aiitg-x1l:g+mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The spectrum of molecular nitrogen

Lofthus¹,

Krupenie²

1977

Journal of Physical and Chemical Reference Data

1,547

808

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“…Experiments aiming at measuring the electron excitation cross section of the upper level C 3 Π u carried out on pure nitrogen at low electron energy (E < 1 keV) and low pressure (a few mTorr or lower) show a fast E −2 dependence of the fluorescence light [46,47,48] much faster than that of the 1N system. This result is expected, taking into account the optically-forbidden nature of the 2P transition.…”

Section: The Second Positive Systemmentioning

confidence: 99%

The yield of air fluorescence induced by electrons

Arqueros

Blanco

Castellanos

et al. 2006

Astroparticle Physics

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The fluorescence yield for dry air and pure nitrogen excited by electrons is calculated using a combination of well-established molecular properties and experimental data of the involved cross sections. Particular attention has been paid to the role of secondary electrons from ionization processes. At high pressure and high energy, observed fluorescence turns out to be proportional to the ionization cross section which follows the Born-Bethe law. Predictions on fluorescence yields in a very wide interval of electron energies (eV -GeV) and pressures (1 and 1013 hPa) as expected from laboratory measurements are presented. Experimental results at energies over 1 MeV are in very good agreement with our calculations for pure nitrogen while discrepancies of about 20% are found for dry air, very likely associated to uncertainties in the available data on quenching cross sections. The relationship between fluorescence emission, stopping power and deposited energy is discussed.

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