Total differential cross sections and differential energy loss spectra for He–C2H2 from anab initiopotential

1997 ◽  
Vol 107 (18) ◽  
pp. 7260-7265 ◽  
Author(s):  
Tino G. A. Heijmen ◽  
Robert Moszynski ◽  
Paul E. S. Wormer ◽  
Ad van der Avoird ◽  
Udo Buck ◽  
...  
Keyword(s):  
Energy Loss ◽  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Total Differential

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.

Sections efficaces différentielles relatives de diffusion des électrons lents (15 à 100 eV) par le krypton

1977 ◽  
Vol 55 (21) ◽  
pp. 1835-1841 ◽  
Author(s):  
A. Delâge ◽  
J.-D. Carette
Keyword(s):  
Energy Loss ◽  
Electron Impact ◽  
Cross Sections ◽  
Differential Cross ◽  
High Energy ◽  
Differential Cross Sections ◽  
Electron Spectrometer ◽  
Scattering Angle ◽  
Resolution Electron

A high energy and angle resolution electron spectrometer has been used to study the electroexcitation of krypton. The energy of the incident electrons considered, 15–100 eV, is in a range about which there is little or nothing known at the present time. The relative differential cross sections of excitation by electron impact are calculated from the energy loss spectra of scattered electrons for angles ranging from 0 to 90°. Some conclusions are drawn from the values of these cross sections as a function of the energy of incident electrons and of the scattering angle.

Sign in / Sign up

Export Citation Format

Share Document