scholarly journals Interaction of Be4+ and Ground State Hydrogen Atom—Classical Treatment of the Collision

Atoms ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 27
Author(s):  
I. Ziaeian ◽  
K. Tőkési
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Hydrogen Atom ◽  
Cross Sections ◽  
Ground State ◽  
Bound States ◽  
Classical Trajectory ◽  
Projectile Energy ◽  
Three Body ◽  
Classical Trajectory Monte Carlo

The interaction between Be4+ and hydrogen atom is studied using the three-body classical trajectory Monte Carlo method (CTMC) and the quasiclassical trajectory Monte Carlo method of Kirschbaum and Wilets (QTMC-KW). We present total cross sections for target ionization, target excitation, and charge exchange to the projectile bound states. Calculations are carried out in the projectile energy range between 10 and 1000 keV/au, relevant to the interest of fusion research when the target hydrogen atom is in the ground state. Our results are compared with previous theoretical results. We found that the classical treatment describes reasonably well the cross sections for various final channels. Moreover, we show that the calculations by the QTMC-KW model significantly improve the obtained cross sections.

scholarly journals State-selective charge exchange cross sections in Be$$^{4+} -\hbox {H}(2\textit{lm})$$ collision based on the classical trajectory Monte Carlo method

2021 ◽  
Vol 75 (4) ◽  
Author(s):  
Iman Ziaeian ◽  
Károly Tőkési
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Energy Range ◽  
Charge Exchange ◽  
Cross Sections ◽  
Impact Energy ◽  
Classical Trajectory ◽  
Quantum Mechanical ◽  
Three Body ◽  
Classical Trajectory Monte Carlo

Abstract A three-body classical trajectory Monte Carlo method is used to calculate the nl state-selective charge exchange cross sections in $$\hbox {Be}^{\mathrm {4+}}+$$ Be 4 + + H(2lm) collisions in the energy range between 10 and 200 keV/amu. We present partial cross sections for charge exchange into $$\hbox {Be}^{\mathrm {3+}}$$ Be 3 + (nl) $$(\textit{nl} = 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, 4f)$$ ( nl = 2 s , 2 p , 3 s , 3 p , 3 d , 4 s , 4 p , 4 d , 4 f ) states as a function of impact energy. Our results are compared with the previous classical and quantum-mechanical results. We show that the classical treatment can able to describe reasonably well the charge exchange cross sections. Graphic abstract

scholarly journals Ionization Cross Sections in the Collision between Two Ground State Hydrogen Atoms at Low Energies

Atoms ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 31
Author(s):  
Saed J. Al Atawneh ◽  
Örs Asztalos ◽  
Borbála Szondy ◽  
Gergő I. Pokol ◽  
Károly Tőkési
Keyword(s):  
Cross Sections ◽  
Ground State ◽  
Classical Trajectory ◽  
Projectile Energy ◽  
Hydrogen Atoms ◽  
Total Cross Sections ◽  
Low Energies ◽  
Ionization Cross Sections ◽  
Final Channel ◽  
Classical Trajectory Monte Carlo

The interaction between two ground state hydrogen atoms in a collision was studied using the four-body classical trajectory Monte Carlo method. We present the total cross sections for the dominant channels, namely for the single ionization of the target, the ionization of the projectile, resulting from pure ionization, and also from the electron transfer (capture or loss) processes. We also present cross sections for the complete break of the system, resulting in the final channel for four free particles. The calculations were carried out at low energies, relevant to the interest of fusion research. We present our cross sections in the projectile energy range between 2.0 keV and 100 keV and compare them with previously obtained theoretical and experimental results.

Target electron removal in C5+ + H collision

2021 ◽  
Author(s):  
Saed J Al Atawneh ◽  
Karoly Tokesi
Keyword(s):  
Monte Carlo ◽  
Cross Sections ◽  
Dominant Role ◽  
Correction Term ◽  
Theoretical Data ◽  
Model Potential ◽  
Classical Trajectory ◽  
Projectile Energy ◽  
Collision Dynamics ◽  
The Cross

Abstract We present target ionization and charge exchange cross sections in a collision between C5+ ion and H atom. We treat the collision dynamics classically using a four-body classical trajectory Monte Carlo (CTMC) and a four-body quasi-classical Monte Carlo (QCTMC) model when the Heisenberg correction term is added to the standard CTMC model via model potential. The calculations were performed in the projectile energy range between 1.0 keV/amu and 10 MeV/amu. We found that the cross sections obtained by the QCTMC model are higher than that of the cross sections calculated by the standard CTMC model and these cross sections are closer to the previous experimental and theoretical data. Moreover, for the case of ionization, we show that the interaction between the projectile and the target electrons plays a dominant role in the enhancement of the cross sections at lower energies.

scholarly journals State-Selective Electron Capture Cross Sections in Collision Between Be4+ and Ground State Hydrogen Atom – Significant Improvement in the Classical Treatment

2021 ◽  
Author(s):  
Iman Ziaeian ◽  
Károly Tőkési
Keyword(s):  
Hydrogen Atom ◽  
Electron Capture ◽  
Cross Sections ◽  
Ground State ◽  
Correction Term ◽  
Projectile Energy ◽  
Quantum Mechanical ◽  
Capture Cross ◽  
Mechanical Methods ◽  
Capture Cross Sections

Abstract We present state-selective electron capture cross sections in collision between Be4+ and ground state hydrogen atom. The n- and nl-selective electron capture cross sections are calculated by a three-body classical trajectory Monte Carlo method (CTMC) and by a classical simulation schema mimicking quantum features of the collision system. The quantum behavior is taken into account with the correction term in the Hamiltonian as was proposed by Kirschbaum and Wilets (C. L. Kirschbaun, and L. Wilet, Phys. Rev. A 21, 834 (1980)). Calculations are carried out in the projectile energy range of 1-1000 keV/amu. We found that our model for Be4++ H(1s) system remarkably improves the obtained state-selective electron capture cross sections, especially at lower projectile energies. Our results are very close and are in good agreement with the previously obtained quantum-mechanical results. Moreover our model with simplicity can time efficiently carry out simulations where maybe the quantum mechanical ones become complicated, therefore, our model should be an alternative way to calculate accurate cross sections and maybe can replace the quantum-mechanical methods.

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