Forbidden doubly excited states of molecular nitrogen dissociating into two neutral atoms in electron collisions

The ordinary and coincident electron-energy-loss spectra of N2 have been measured in an expected energy range for the formation of doubly excited states to investigate their formation and decay processes in electron-N2 collisions. The present results are compared with those obtained by photoexcitation experiments. Existence of the optically forbidden doubly excited states and their dissociative character have been revealed clearly for the first time.

[1]  L. Avaldi,et al.  Observation of doubly excited states in the N2+2σu-1 partial ionization cross section measured by (e, 2e) experiments , 2000 .

[2]  E. Shigemasa,et al.  Dissociative single and double photoionization with excitation between 37 and 69 eV in N2 , 2000 .

[3]  J. Bieroń,et al.  Hyperfine-structure calculations in Xe II , 2000 .

[4]  E. Rachlew,et al.  Neutral dissociation by non-Rydberg doubly excited states , 1999 .

[5]  Y. Hatano.  Interaction of vacuum ultraviolet photons with molecules. Formation and dissociation dynamics of molecular superexcited states , 1999 .

[6]  Y. Hatano,et al.  Predissociation of optically forbidden states in electron-hydrogen collisions as studied by coincident electron energy-loss spectroscopy , 1999 .

[7]  Y. Hatano,et al.  Isotope effects in the dynamics of doubly excited states of molecular hydrogen and deuterium as studied by coincident electron-energy-loss spectroscopy , 1998 .

[8]  L. Veseth,et al.  Doubly excited autoionizing states in N 2 , 1997 .

[9]  J. Ajello,et al.  Fast nitrogen atoms from dissociative excitation of N2 by electron impact , 1996 .

[10]  Erman,et al.  Ultrashort-lived non-Rydberg doubly excited resonances observed in molecular photoionization. , 1996, Physical review letters.

[11]  Y. Hatano,et al.  Doubly excited states of molecular hydrogen as studied by coincident electron-energy-loss spectroscopy , 1996 .

[12]  M. Ukai.  SPECTROSCOPY AND DYNAMICS OF SUPEREXCITED MOLECULES AS PROBED BY FLUORESCENCE MEASUREMENTS , 1996 .

[13]  Y. Hatano,et al.  Electron energy-loss study of superexcited hydrogen molecules with the coincidence detection of the neutral dissociation , 1995 .

[14]  S. Iwata,et al.  Theoretical assignment of the vibronic bands in the photoelectron spectra of N2 below 30 eV , 1993 .

[15]  C. E. Brion,et al.  Absolute optical oscillator strengths for discrete and continuum photoabsorption of molecular nitrogen (11–200 eV) , 1993 .

[16]  Tanaka,et al.  Neutral decay of double-holed doubly excited resonances of N2. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[17]  Karlsson,et al.  Inner-valence states of N2+ studied by uv photoelectron spectroscopy and configuration-interaction calculations. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[18]  S. Svensson,et al.  Inner valence satellite structure in high resolution X-ray excited photoelectron spectra of N2 and CO , 1991 .

[19]  Lucas,et al.  Electron-impact excitation of the 31.4-eV band in N2. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[20]  J. W. Gallagher,et al.  Absolute Cross Sections for Molecular Photoabsorption, Partial Photoionization, and Ionic Photofragmentation Processes , 1987 .

[21]  Boris M. Smirnov,et al.  Reference Data on Atoms, Molecules, and Ions , 1985 .

[22]  D. Shemansky,et al.  A reexamination of important N2 cross sections by electron impact with application to the dayglow: The Lyman-Birge-Hopfield Band System and N I (119.99 nm) , 1985 .

[23]  H. Oertel,et al.  Fluorescence from 1Πu and 1Σ+u states of molecular nitrogen excited with synchrotron radiation between 12.4 and 18.8 eV , 1981 .

[24]  D. Dill,et al.  Shape-Resonance-Enhanced Nuclear-Motion Effects in Molecular Photoionization , 1979 .

[25]  P. Hicks,et al.  High resolution studies of dipole-forbidden states of N2 using low-energy electron energy-loss spectroscopy , 1979 .

[26]  Paul H. Krupenie,et al.  The spectrum of molecular nitrogen , 1977 .

[27]  R. Bonham,et al.  Observation of a new electronic transition in N2 at 31.4 eV by means of high energy electron impact spectroscopy , 1975 .

[28]  E. N. Lassettre,et al.  Generalized Oscillator Strength for 11S→21P Transition of Helium. Theory of Limiting Oscillator Strengths , 1969 .

[29]  B. Schröder,et al.  Intensity Perturbations Due to Configuration Interaction Observed in the Electron Energy‐Loss Spectrum of N2 , 1969 .

[30]  K. Codling.  Structure in the Photo-Ionization Continuum of N_{2} Near 500 Å , 1966 .

[31]  S. G. Tilford,et al.  The High Resolution Absorption Spectrum of Nitrogen from 1060 TO 1520 Å. III. The B'^{3}Σ_{u} <- Χ^{1}Σ_{g}^{+} System. , 1965 .