incoming electron
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Author(s):  
Miron Ya. Amusia ◽  
Arkadiy S Baltenkov

Abstract In this paper we calculate the elastic scattering cross sections of slow electron by carbon nanotubes. The corresponding electron-nanotube interaction is substituted by a zero-thickness cylindrical potential that neglects the atomic structure of real nanotubes, thus limiting the range of applicability of our approach to sufficiently low incoming electron energies. The strength of the potential is chosen the same that was used in describing scattering of electrons by fullerene C60. We present results for total and partial electron scattering cross sections as well as respective angular distributions, all with account of five lowest angular momenta contributions. In the calculations we assumed that the incoming electron moves perpendicular to the nanotube axis, since along the axis the incoming electron moves freely.


2015 ◽  
Vol 17 (39) ◽  
pp. 25689-25692 ◽  
Author(s):  
Madanakrishna Katari ◽  
Eleonore Payen de la Garanderie ◽  
Edith Nicol ◽  
Vincent Steinmetz ◽  
Guillaume van der Rest ◽  
...  

Gas-phase reduction of a Zn(ii) complex followed by IR spectroscopy shows that the incoming electron is localized on the metal rather than on the ligand.


2000 ◽  
Vol 14 (19) ◽  
pp. 693-699 ◽  
Author(s):  
P. X. WANG ◽  
Y. K. HO ◽  
Q. KONG ◽  
X. Q. YUAN ◽  
N. CAO ◽  
...  

This paper studies the characteristics of GeV electron bunches driven by ultra-intense lasers in vacuum based on the mechanism of capture and violent acceleration scenario [CAS, see, e.g. J. X. Wang et al., Phys. Rev.E58, 6575 (1998)], which shows an interesting prospect of becoming a new principle of laser-driven accelerators. It has been found that the accelerated GeV electron bunch is a macro-pulse composed of a lot of micro-pulses, which is analogous to the structure of the bunches produced by conventional linacs. The macro-pulse corresponds to the duration of the laser pulse while the micro-pulse corresponds to the periodicity of the laser wave. Therefore, provided that the incoming electron bunch with comparable sizes as that of the laser pulse synchronously impinges on the laser pulse, the total fraction of electrons captured and accelerated to GeV energy can reach more than 20%. These results demonstrate that the mechanisms of CAS is a relatively effective accelerator mechanism.


2000 ◽  
Vol 15 (16) ◽  
pp. 2347-2353
Author(s):  
CLEMENS A. HEUSCH

It has become a natural mandate to the particle physics community to look beyond presently active and approved high-energy accelerators for precision work at the edge of, and beyond, the Standard Model. We stress the mandate for complementary use of both charge modes of the Electron Collider, e+e- and e+e-. Choosing a few illustrative examples, we attempt to set the stage for technical developments needed to define and execute the key experiments using two incoming electron beams.


It is shown without using perturbation theory that, if charge renormalization is defined in the usual way, the charge operator has the eigenvalue e ( n_-n + ) for a state corresponding to n _ incoming electrons, n + incoming positrons, and an arbitrary number of incoming photons. It is also shown that, in the special case of one incoming electron and no other incoming particles, this leads to the statement that the radiative corrections to the Rutherford formula for the scattering in a weak external field vanish in the non-relativistic limit.


Recently a method has been developed whereby the total ionisation due to the absorption of slow cathode rays may be directly measured. The application of this method to measurements of the total ionisation in air was the subject of a previous paper. The present paper concerns its application to helium, argon, hydrogen, nitrogen, and carbon dioxide. A beam of electrons, all having the same initial energy, was introduced into an ionisation chamber containing gas at a given pressure. The incoming electron current and the ionisation current due to the passage of the electrons through the chamber were measured. The ratio ionisation current/electron current determined the average ionisation per electron. A detailed description of apparatus and procedure has been given previously. There follows a statement of the purity of gases used in the ionisation measurements.


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