Absolute, cascade-free cross sections for the2S→2Ptransition inZn+using electron-energy-loss and merged-beams methods

1991 ◽  
Vol 67 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Steven J. Smith ◽  
K-F. Man ◽  
R. J. Mawhorter ◽  
I. D. Williams ◽  
A. Chutjian
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Electron Energy Loss

Determination of cross sections and oscillator strengths for argon by electron-energy-loss spectroscopy

1988 ◽  
Vol 38 (3) ◽  
pp. 1240-1247 ◽  
Author(s):  
G. P. Li ◽  
T. Takayanagi ◽  
K. Wakiya ◽  
H. Suzuki ◽  
T. Ajiro ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Electron Energy Loss Spectroscopy ◽  
Oscillator Strengths ◽  
Electron Energy Loss

scholarly journals Deconvolution of Overlapping Features in Electron Energy-loss Spectra: Determination of Absolute Differential Cross Sections for Electron-impact Excitation of Electronic States of Molecules

1997 ◽  
Vol 50 (3) ◽  
pp. 525 ◽  
Author(s):  
L. Campbell ◽  
P. J. O. Teubner ◽  
M. J. Brunger ◽  
B. Mojarrabi ◽  
D. C. Cartwright
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Differential Cross ◽  
Electronic States ◽  
Impact Excitation ◽  
Spectroscopic Constants ◽  
Differential Cross Sections ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

A set of three computer programs is reported which allow for the deconvolution of overlapping molecular electronic state structure in electron energy-loss spectra, even in highly perturbed systems. This procedure enables extraction of absolute differential cross sections for electron-impact excitation of electronic states of diatomic molecules from electron energy-loss spectra. The first code in the sequence uses the Rydberg–Klein–Rees procedure to generate potential energy curves from spectroscopic constants, and the second calculates Franck–Condon factors by numerical solution of the Schrödinger equation, given the potential energy curves. The third, given these Franck–Condon factors, the previously calculated relevant energies for the vibrational levels of the respective electronic states (relative to the v″ = 0 level of the ground electronic state) and the experimental energy-loss spectra, extracts the differential cross sections for each state. Each program can be run independently, or the three can run in sequence to determine these cross sections from the spectroscopic constants and the experimental energy-loss spectra. The application of these programs to the specific case of electron scattering from nitric oxide (NO) is demonstrated.

scholarly journals Photoabsorption of hydrocarbons in Titan's atmosphere

2009 ◽  
Vol 5 (H15) ◽  
pp. 678-679
Author(s):  
Fabíola P. Magalhães ◽  
Gerardo G. B. de Souza ◽  
Heloisa M. Boechat-Roberty
Keyword(s):  
Energy Loss ◽  
Absorption Spectra ◽  
Electron Energy ◽  
Cross Sections ◽  
Molecular Species ◽  
Uv Absorption ◽  
Synthetic Spectrum ◽  
Uv Absorption Spectra ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

AbstractTitan, the largest satellite of the planet Saturn, has a thick atmosphere which consists of nitrogen (N2) and methane (CH4). In 2004, the Cassini-Huygens mission observed the occultation of two stars through the atmosphere of Titan and measured ultraviolet (UV) absorption spectra. Through these spectra it was possible to identify the molecular species contained in this environment. In the present work, we have simulated a spectrum of this atmosphere using some molecules such as CH4, C2H2, C2H4, C2H6, C4H2, and C6H6. Our cross sections data were experimentally obtained using the electron energy-loss technique, where the electron energy-loss spectra, measured high incident energies and in small scattering angles, are similar to photoabsorption spectra. The comparison of our synthetic spectrum with that measured by Cassini shows that this method is very efficient for identifying molecules as well as estimating abundances.

Excitation cross sections for thens2S→np2Presonance transitions inMg+(n=3) andZn+(n=4) using electron-energy-loss and merged-beams methods

1993 ◽  
Vol 48 (1) ◽  
pp. 292-309 ◽  
Author(s):  
Steven J. Smith ◽  
A. Chutjian ◽  
J. Mitroy ◽  
S. S. Tayal ◽  
Ronald J. W. Henry ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Excitation Cross Sections ◽  
Electron Energy Loss

RESONANCE EFFECTS OBSERVED IN THE INTERACTION OF LOW-ENERGY ELECTRONS AND INTRAMOLECULAR VIBRATIONS OF SOLID C70

1995 ◽  
Vol 02 (05) ◽  
pp. 557-562 ◽  
Author(s):  
L.-M. YU ◽  
B.-Y. HAN ◽  
K. HEVESI ◽  
P. RUDOLF ◽  
G. GENSTERBLUM ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Cross Sections ◽  
Negative Ion ◽  
Resonance Effects ◽  
Resolution Electron ◽  
Low Energy Electrons ◽  
Intramolecular Vibrations ◽  
The Impact ◽  
Electron Energy Loss

The intramolecular vibrations of a thick epitaxial C 70(111) film on GeS (001) have been measured by high-resolution electron energy-loss spectroscopy (HREELS). A negative-ion resonant behavior is observed in the energy dependence of the impact scattering differential cross sections. These resonances are described as electronic excitation associated shape resonances, which are coincident with the electron energy loss and free-electron capture experiments. Finally, the effect of charge transfer on the resonance behavior is discussed through the comparison of bulk spectra with those from an adsorbed monolayer of C 70 on Au (110).

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