Results 261 to 270 of about 23,220,508 (301)

Comment on  Integral cross sections for electron impact excitation of electronic states of N₂ 

Journal of Physics B: Atomic, Molecular and Optical Physics, 2002
Based on the existing experimental data and their statistical errors, it is not possible to make a sound recommendation of the cross-section set of Campbell et al (J. Phys. B: At. Mol. Opt. Phys. 34 (2001) 1185). We comment on this paper.
Cenian, A., Chernukho, A., Bogaerts, A., Gijbels, R.   +3 more
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Measurement of cross sections for electron capture inton=3states of hydrogen

Physical Review A, 1989
We have measured the cross sections for electron capture into the n = 3,L,M/sub L/ states of hydrogen for protons colliding with helium atoms at energies between 30 and 80 keV. We used a microwave-resonance, optical detection technique, in which a microwave field drives transitions within the n = 3 manifold of the hydrogen atoms, and the change in the ...
, Brower, , Pipkin
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Charge-state dependence of binary-encounter-electron cross sections and peak energies

Physical Review A, 1993
The charge-state dependence of the binary-encounter-electron (BEE) double-differential cross section (DDCS) at 0\ifmmode^\circ\else\textdegree\fi{} with respect to the beam direction resulting from collisions of 1 MeV/amu ${\mathrm{H}}^{+}$, ${\mathrm{C}}^{\mathit{q}+}$, ${\mathrm{N}}^{\mathit{q}+}$, ${\mathrm{O}}^{\mathit{q}+}$, ${\mathrm{F}}^{\mathit{
, Hidmi, , Richard, , Sanders, , Schöne, , Giese, , Lee, , Zouros, , Varghese   +7 more
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Coherent excitation of wavepackets in two electronic states. Interference effects at an avoided crossing

Chemical Physics Letters, 1995
Abstract We present quantum mechanical calculations of the nonadiabatic time-evolution of molecular states in a model system. The simultaneous coherent excitation of two different electronic states is simulated. The repulsive potential energy curves representing the excited states undergo an avoided crossing, which causes the interference of the two ...
GRANUCCI, GIOVANNI, PERSICO, MAURIZIO
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Electronic states and wave functions associated with orbital energy crossing

International Journal of Quantum Chemistry, 2009
A simple two-electron, two-orbital model is used to discuss the electronic states and wave functions in molecules where orbital energies corresponding to different symmetries cross. According to this model, it is predicted that the triplet state has the lowest energy in the crossing region.
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On the effect of the electron bound state structure on ionization cross sections in atomic collisions

Physics Letters A, 1970
Abstract The cross sections for 1s- and 2s-electron loss by various hydrogen-like ions colliding with H and He have been calculated and compared. An exact expression is given for the square of the matrix element of the 2s-electron transition to the continuum states.
V S Nikolaev, V S Senashenko, V Yu Shafer   +2 more
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Molecular Wire Electronic State Crossing Driven by Applied Voltage

The Journal of Physical Chemistry B, 2000
The effect of applying an external voltage to a molecular wire connecting two reservoirs of states is analyzed through the use of a Hubbard Hamiltonian which explicitly depends on the applied volta...
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Cross sections for electron impact excitation of the C Π1 and D Σ1+ electronic states in N2O

The Journal of Chemical Physics, 2009
Differential and integral cross sections for electron-impact excitation of the dipole-allowed C Π1 and D Σ1+ electronic states of nitrous oxide have been measured. The differential cross sections were determined by analysis of normalized energy-loss spectra obtained using a crossed-beam apparatus at six electron energies in the range 15–200 eV ...
Kawahara, H, Suzuki, Daisuke, Kato, H, Hoshino, M, Tanaka, Hiroshi, Ingolfsson, Oddur, Campbell, Laurence, Brunger, Michael James   +7 more
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Integral cross sections for electron impact excitation of electronic states of N₂

Journal of Physics B: Atomic, Molecular and Optical Physics, 2001
We report integral cross sections (ICSs) for electron impact excitation of the A 3Σ+u, B 3Πg, W 3Δu, B' 3Σ-u, a' 1Σ-u, a 1Πg, ω1Δu, C 3Πu, E 3Σ+g and a'' 1Σ+g electronic states of N2. The present data, for each state, were derived at five incident electron energies in the range 15-50 eV, from the earlier crossed-beam differential cross section (DCS ...
L Campbell, M J Brunger, A M Nolan, L J Kelly, A B Wedding, J Harrison, P J O Teubner, D C Cartwright, B McLaughlin   +8 more
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Calculation of Electron Impact Cross Sections from Metastable States.

1978
Abstract : A multi-channel eikonal theoretical treatment of atomic collisions is developed with electron-metastable atom collisions in mind. The treatment is applied to electron-impact excitation of hydrogen and helium atoms in their ground state and of helium initially in its metastable level.
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