Electron excitation of the E 3Sigmag + state of N2 and subsequent collisional deactivation and energy transfer to the C 3Piu state

The excitation and subsequent decay of the E 3Σg+ state of N2 has been studied in a delayed coincidence experiment with a pulsed electron beam by monitoring the time and pressure dependence of the second positive C 3Πu→B 3Πg(0,0) radiation at 3371 A. The rate equations for the populations of the E and C states have been analyzed for the conditions of the experiment and the relevant equations obtained. The analysis shows the 3371 A radiation detected, at times long compared to the C state lifetime, to be associated with the initial E state population. Analysis of the time and pressure dependence of this long lived radiation yields a value of 3.8×103 sec−1 mtorr−1 for the collisional deactivation rate coefficient for the E state and a value of 1.9×103 sec−1 mtorr−1 for the energy transfer rate coefficient between the E and C states.

[1]  D. Golden,et al.  Role of resonances in the electron-impact excitation functions of the C 3 Π u and E 3 Σ + g states of N 2 , 1974 .

[2]  S. Ormonde,et al.  Negative ion lasers , 1974 .

[3]  D. Burns,et al.  Lifetime of the D 3Σu+ state of N2 , 1973 .

[4]  D. Burns,et al.  Contribution of the Metastable E ^{3}Σ_{g}^{+} State to the Population of the C ^{3}Π_{u} State of N_{2} Following Electron-Impact Excitation , 1973 .

[5]  J. Reinhardt,et al.  Electron excitation of N2. II. Resonant phenomena associated with Rydberg states , 1973 .

[6]  S. Lawton,et al.  Resonances in the Metastable Excitation of Molecular Nitrogen , 1973 .

[7]  J. P. Doering,et al.  High Energy‐Resolution Studies of Electron Impact Optical Excitation Functions I. The Second Positive System of N2 , 1972 .

[8]  W. L. Borst,et al.  Excitation of the Metastable E Σ g + 3 State of N 2 by Electron Impact , 1972 .

[9]  G. Schulz,et al.  ELECTRON TRANSMISSION SPECTROSCOPY: CORE-EXCITED RESONANCES IN DIATOMIC MOLECULES. , 1972 .

[10]  F. H. Read,et al.  Electron impact studies of a resonant state of N2 , 1971 .

[11]  W. L. Borst,et al.  Lifetimes of metastable CO and N2 molecules , 1971 .

[12]  F. J. Heer,et al.  Emission cross sections of the second positive group of nitrogen produced by electron impact , 1969 .

[13]  R. Freund.  Molecular‐Beam Measurements of the Emission Spectrum and Radiative Lifetime of N2 in the Metastable E 3Σg+ State , 1969 .

[14]  F. R. Simpson,et al.  Absolute cross sections for electron excitation of the second positive bands of nitrogen , 1969 .

[15]  A. Ali,et al.  Theory of the pulsed molecular nitrogen laser. , 1967, Applied Optics.

[16]  H. Ehrhardt,et al.  Die Winkelabhängigkeit der Resonanzstreuung niederenergetischer Elektronen an N2 , 1967 .

[17]  F. A. Sharpton,et al.  Apparent Cross Sections of N 2 for Electron Excitation of the Second Positive System , 1967 .

[18]  V. Cermak,et al.  Detection of Long‐Lived Excited States of Molecules by Penning Ionization , 1966 .

[19]  G. E. Chamberlain,et al.  Resonances in the Elastic and Inelastic Electron Scattering from N2 , 1966 .

[20]  K. Street,et al.  Determination of the Excitation Functions for Formation of Metastable States of Some Rare Gases and Diatomic Molecules by Electron Impact , 1965 .

[21]  D. T. Stewart,et al.  Some Electron Collision Cross Sections for Nitrogen and Oxygen , 1958 .

[22]  W. Lichten.  Lifetime Measurements of Metastable States in Molecular Nitrogen , 1957 .

[23]  C. Elvey,et al.  Aurora and Airglow , 1955 .