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 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.

DOUBLE EXCITATION IN PROTON–HELIUM COLLISIONS

1995 ◽  
Vol 09 (25) ◽  
pp. 3269-3301 ◽  
Author(s):  
M. SCHULZ
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Experimental Studies ◽  
Projectile Energy ◽  
Interference Effects ◽  
Double Excitation ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
Excitation Mechanisms ◽  
The Cross

Theoretical and experimental studies on double excitation in proton–helium collisions are reviewed. Two theoretical approaches, which are common in the treatment of atomic collision processes, are described: perturbative approaches and the close coupling method. Experimentally, double excitation has mainly been studied by spectroscopy of the autoionized electrons emitted by the decay of the doubly excited states and by projectile energy-loss spectroscopy. The results emerging from the theoretical and experimental studies include the following points: first, the coupling of the doubly excited states to the continuum is very important in the electron spectra leading to pronounced interference effects. Second, double excitation mechanisms involving the electron–electron interaction are dominant except for low projectile energies. Third, interference effects between various double excitation mechanisms appear to be insignificant in the cross-sections differential in the electron emission angle, but might be important under certain conditions in the cross-sections differential in the projectile scattering angle.

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.

scholarly journals State selective classical electron capture cross sections in Be4+  + H(1s) collisions with mimicking quantum effect

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Iman Ziaeian ◽  
Károly Tőkési
Keyword(s):  
Electron Capture ◽  
Cross Sections ◽  
Quantum Effect ◽  
Correction Term ◽  
Projectile Energy ◽  
Quantum Mechanical ◽  
Capture Cross ◽  
Classical Electron ◽  
Mechanical Methods ◽  
Capture Cross Sections

AbstractWe 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 (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.

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

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