scholarly journals Elliptically polarized laser assisted elastic electron-hydrogen atom collision and differential scattering cross-section

2020 ◽  
pp. 93-102
Author(s):  
Kishori Yadav ◽  
S.P. Gupta ◽  
J.J. Nakarmi
Keyword(s):  
Hydrogen Atom ◽  
Kinetic Energy ◽  
Cross Section ◽  
Laser Field ◽  
High Energy ◽  
Scattering Cross Section ◽  
Hydrogen Atoms ◽  
Differential Scattering Cross Section ◽  
Scattering Cross ◽  
Cross Section Area

In the present study, we have investigated scattering of an electron by hydrogen atoms in the presence of the elliptical polarized laser field. We have discussed the polarization effect of laser field on hydrogen atom and effect of the resulted polarized potential on differential scattering cross-section is studied. We assume the scattered electrons having kinetic energy (~3000 eV) and laser field of moderate field strength because it is permitted to treat the scattering process in first Born approximation and the scattering electron was described by Volkov wave function. We found that the differential scattering cross-section area increases with the increase of the kinetic energy of the incident electron and there is no effect of changing the value of polarizing angle on the differential cross-section with kinetic energy. We observed that differential scattering cross-section in elliptical polarization in the high energy region depends upon the laser intensity and the incident energy for a linearly polarized field.

scholarly journals Free Scattering Theory in Circularly Polarized Laser Field

2017 ◽  
Vol 4 (1) ◽  
pp. 78
Author(s):  
Kishori Yadav ◽  
Jeevan Jyoti Nakarmi ◽  
Sanam Maharjan
Keyword(s):  
Kinetic Energy ◽  
Cross Section ◽  
Laser Field ◽  
Scattering Amplitude ◽  
Scattering Cross Section ◽  
Hydrogen Atoms ◽  
Circularly Polarized ◽  
Differential Scattering Cross Section ◽  
Scattering Cross ◽  
Elastic Scattering Amplitude

<p class="Default">In the present study, we have investigated scattering of an electron by hydrogen atoms in the presence of the Circularly Polarized (CP) laser field. We have discussed the polarization effect of laser field on hydrogen atom and effect of the resulted polarized potential on differential scattering cross section is studied. We assumed the scattered electrons having kinetic energy 100 eV because it permitted to treat the scattering process in first order Born Approximation. The scattering electron was described by Volkov wave function. We found the differential scattering cross section decreases with the increase in scattering angle, for a fixed value of a laser parameters and kinetic energy of an incident electron. From this study we found that, the differential scattering cross section for the electric field perpendicular to the direction of momentum transfer depends on the elastic scattering amplitude. Finally, we concluded that the differential scattering cross section greatly depends upon the polarization of the laser field.</p><p><strong>Journal of Nepal Physical Society</strong><br />Volume 4, Issue 1, February 2017, Page: 78-87</p>

Imaging intramolecular hydrogen migration with time- and momentum-resolved photoelectron diffraction

2021 ◽  
Author(s):  
Fukiko Ota ◽  
Shigeru Abe ◽  
Keisuke Hatada ◽  
Kiyoshi Ueda ◽  
Sergio Díaz-Tendero ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Cross Section ◽  
Time Resolution ◽  
Ultrafast Spectroscopy ◽  
Scattering Cross Section ◽  
Photoelectron Diffraction ◽  
Hydrogen Migration ◽  
Scattering Cross ◽  
Intramolecular Hydrogen

Imaging ultrafast hydrogen migration with few- or sub-femtosecond time resolution is a challenge for ultrafast spectroscopy due to the lightness and small scattering cross section of the moving hydrogen atom....

Resonant emission of hard gamma-quanta at scattering of ultrarelativistic electrons on a nucleus within the external light field

2020 ◽  
Vol 35 (03) ◽  
pp. 2040024 ◽  
Author(s):  
Alexander Dubov ◽  
Victor V. Dubov ◽  
Sergei P. Roshchupkin
Keyword(s):  
Cross Section ◽  
Gamma Quantum ◽  
External Electromagnetic Field ◽  
High Energy ◽  
Scattering Cross Section ◽  
Photon Radiation ◽  
Order Effects ◽  
Data Simulation ◽  
Scattering Cross ◽  
Resonant Emission

The contemporary theoretical investigation researches the resonant emission of high-energy gamma-quanta within the process of scattering of ultrarelativistic electrons on a nucleus in the external electromagnetic field. With implementation of the resonant conditions under the field ambience the particle in the intermediate state re-modulates into the real form. Therefore, the phenomenon examination determines the functional splitting of the second order process into a pair of first-order effects that possess a possibility to develop within two reaction channels. Consequently, the first channel characterizes the kinematics of electron scattering by a nucleus and following radiation of a spontaneous gamma-quantum. The second channel delineates the spontaneous gamma-quantum radiation by an electron with subsequent scattering on a nucleus. It is important to emphasize that within a specific range of observation the calculations derive three discrete magnitudes for the resonant frequency dependency on the angle of spontaneous photon radiation. As a result, the work represents an estimation of the resonant differential scattering cross-section in ratio to the scattering cross-section computed without the external field. In conclusion, various scientific facilities may verify the project data simulation (SLAC, FAIR, XFEL, ELI, XCELS).

scholarly journals Differential scattering cross section of the dense semiclassical plasma based on the Born method

2020 ◽  
Vol 73 (2) ◽  
pp. 34-40
Author(s):  
E.O. Shalenov ◽  
Zh. Kossymkyzy ◽  
M. Seisembayeva ◽  
R. Masheyeva ◽  
M.N. Jumagulov ◽  
...  
Keyword(s):  
Cross Section ◽  
Scattering Cross Section ◽  
Differential Scattering Cross Section ◽  
Scattering Cross
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