Journal ArticleDOI
Vibrational excitation of N2 by resonance scattering of electrons
D T Birtwistle,A Herzenberg +1 more
Reads0
Chats0
TLDR
In this paper, the vibrational excitation of N2 molecules by resonance scattering of electrons of 2-3 eV is calculated with a compound state model, that is on the assumption that the mechanism is e+N2 to N2-to N2+e'.Abstract:
The vibrational excitation of N2 molecules by resonance scattering of electrons of 2-3 eV is calculated with a compound state model, that is on the assumption that the mechanism is e+N2 to N2- to N2+e'. The complex electronic energy of the N2- ion is treated parametrically, the essential new point being that Gamma /h(cross), the autoionization rate, varies with the separation of the nuclei. The variation comes from the dependence of the angular momentum barrier on the energy of the emitted electron. Good agreement is obtained with the experimental energy dependence of cross sections with reasonable values of the parameters. Calculations have also been done to illustrate the transition to the impulse limit as Gamma is increased, and to the compound molecule limit as Gamma is reduced.read more
Citations
More filters
Journal ArticleDOI
Resonances in Electron Impact on Diatomic Molecules
TL;DR: In this article, the energies, configuration, and other properties of resonances (also called "compound states" and "temporary negative ions") in diatomic molecules are presented in the form of tables and energy level diagrams.
Journal ArticleDOI
The theory of electron-molecule collisions
TL;DR: The current state of the theory and its application to low-energy electron-molecule collisions is reviewed in this paper, where the emphasis is on elastic scattering and vibrational and rotational excitation of small diatomic and polyatomic molecules.
Journal ArticleDOI
The ‘chemical’ (electronic) contribution to surface‐enhanced Raman scattering
TL;DR: In this paper, surface-enhanced Raman scattering (SERS) by time-dependent evolution in the intermediate anionic state of the adsorbate is analogous to intramolecular Franck-Condon resonance Raman scatterings.
Journal ArticleDOI
Electron Attachment Energies of the DNA Bases
TL;DR: In this article, a common range of attachment energies into the lowest orbitals is observed in all the bases, and evidence for nuclear motion during the lifetimes of the anions is found in all compounds except adenine.
Journal ArticleDOI
Study of triplet states and short-lived negative ions by means of electron impact spectroscopy
TL;DR: The trochoidal electron spectrometer as discussed by the authors is a recently developed type of instrument, capable of measuring electron transmission spectra and also inelastic cross sections (a superposition of 0° and 180° scattering).
References
More filters
Book
Molecular Spectra and Molecular Structure: I. Spectra of Diatomic Molecules
Gerhard Herzberg,S. Mrozowski +1 more
Journal ArticleDOI
On the Derivation of the Dispersion Formula for Nuclear Reactions
TL;DR: In this paper, a derivation of the nuclear dispersion formula was carried out starting out in a similar way, but avoiding certain disadvantages of their treatment, which mainly consist in too restricting assumptions.
Journal ArticleDOI
Potential energy curves for N2, NO, O2 and corresponding ions
TL;DR: In this paper, potential energy curves for the observed electronic states of N2, N2+), NO, NO(+), O2 and O2+ were calculated from published spectroscopic data by a numerical modification of the Rydberg-Klein method.
Journal ArticleDOI
VIBRATIONAL EXCITATION OF N$sub 2$, CO, AND H$sub 2$ BY ELECTRON IMPACT
Journal ArticleDOI
The dispersion formula for nuclear reactions
P. L. Kapur,Rudolf Peierls +1 more
TL;DR: In this article, the authors gave a formula for the probability of a nuclear reaction in terms of the virtual state, taking into account only one such state, while Bethe and Placzek (1937) generalized the formula to take account of all possible virtual states.