Transmission d'électrons de 0–15 eV à travers des films minces de solides bio-organiques à 300 K : application au tryptophane

1987 ◽  
Vol 65 (9) ◽  
pp. 1133-1140 ◽  
Author(s):  
Grégoire Leclerc ◽  
Thomas Goulet ◽  
Pierre Cloutier ◽  
Jean-Paul Jay-Gerin ◽  
Léon Sanche
Keyword(s):  
Cross Sections ◽  
Low Energy ◽  
Electronic Transitions ◽  
Theoretical Simulation ◽  
Electron Transmission ◽  
Organic Solid ◽  
Low Energy Electrons ◽  
Solid Thin Films ◽  
First Time ◽  
Interaction Cross Sections

We present an experimental method for measuring low-energy (0–15 eV) electron transmission through bio-organic, solid, thin films at 300 K. This method is used to determine the energy of the first electronic transitions and the energy of the lowest conduction level of an electron in those solids. By measuring the density and thickness of the films precisely and analyzing the experimental data with a theoretical simulation model, it is possible, for the first time, to estimate values of the interaction cross sections for low-energy electrons in a biological solid. As an illustration of the method, results obtained for tryptophan are presented. [Translated by the journal]

scholarly journals Взаимодействие низкоэнергетических электронов с молекулами D-рибозы

2021 ◽  
Vol 129 (12) ◽  
pp. 1471
Author(s):  
И.В. Чернышова ◽  
Е.Э. Контрош ◽  
О.Б. Шпеник
Keyword(s):  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Electron Scattering ◽  
Cross Sections ◽  
Electron Attachment ◽  
Low Energy ◽  
Dissociative Electron Attachment ◽  
Low Energy Electrons ◽  
First Time

Abstract– The interactions of low-energy electrons (<20 eV) with D-ribose molecules, namely, electron scattering and dissociative attachment, are studied. The results of these studies showed that the fragmentation of D-ribose molecules occurs effectively even at an electron energy close to zero. as well as in the energy range 5.50–9.50 eV. In the total cross section of electron scattering by molecules, resonance features at energies of 5.00–9.00 eV in the region of formation of ionic fragments C3H4O2–, C2H3O2–, OH–, associated with the destruction of molecular heterocycles, were experimentally discovered for the first time. The correlation of the features observed in the scattering and dissociative electron attachment cross sections is analyzed.

Inelastic collisions at low energies

1969 ◽  
Vol 47 (10) ◽  
pp. 1723-1729 ◽  
Author(s):  
A. Dalgarno
Keyword(s):  
Energy Loss ◽  
Cross Sections ◽  
Low Energy ◽  
Inelastic Collisions ◽  
Low Energies ◽  
Low Energy Electrons ◽  
The Cross ◽  
Loss Rates

A summary is presented of the processes by which low energy electrons lose energy in moving through the atmosphere and estimates are given of the cross sections and energy loss rates. The mechanisms by which thermal electrons cool are described and the cooling efficiencies are listed.

Modelling Interaction Cross Sections for Intermediate and Low Energy Ions

2002 ◽  
Vol 99 (1) ◽  
pp. 49-51 ◽  
Author(s):  
L. H. Toburen ◽  
J. L. Shinpaugh ◽  
E. L. B. Justiniano
Keyword(s):  
Cross Sections ◽  
Low Energy ◽  
Low Energy Ions ◽  
Interaction Cross Sections

Differential and integral cross sections for elastic scattering of low-energy electrons by O2

1995 ◽  
Vol 28 (18) ◽  
pp. 4141-4148 ◽  
Author(s):  
G Woste ◽  
C J Noble ◽  
K Higgins ◽  
P G Burke ◽  
M J Brunger ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Low Energy ◽  
Low Energy Electrons

HgCl B2Σ+1/2 formation by low-energy electron impact dissociation of HgCl2 and(or) CH3HgCl molecules: applications to HgCl (B → X) laser

1990 ◽  
Vol 68 (2) ◽  
pp. 166-169 ◽  
Author(s):  
Mohammad F. Mahmood
Keyword(s):  
Energy Range ◽  
Electron Energy ◽  
Cross Sections ◽  
Band System ◽  
Low Energy ◽  
Dissociative Excitation ◽  
Intense Band ◽  
Electron Impact Dissociation ◽  
Low Energy Electrons ◽  
Low Energy Electron

An investigation was made of the process of dissociative excitation of a HgCl radical in the B2Σ+1/2 state due to collisions of low-energy electrons with HgCl2 and CH3HgCl molecules. Using the most intense band of the B2Σ+1/2 – X2Σ+1/2 system of the HgCl radical at 557 nm that corresponds to the ν′ = 0 to ν″ = 22 transition, emission cross sections were measured in the electron energy range 1–100 eV. The threshold electron energy for the observation of the B2Σ+1/2 – X2Σ+1/2 band system has been determined to be 7.0 and 8.0 eV for HgCl2 and CH3HgCl molecules, respectively.

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