Time-Dependent Close-Coupling Calculations for Ion-Impact Ionization of Atoms and Molecules

We have measured and calculated fully differential cross sections (FDCS) for ionization of helium by 75 keV proton impact. Ejected electron with a speed close to and above the projectile speed were investigated. This range of kinematics represents a largely unexplored regime. A high sensitivity of the FDCS to the details of the description of the few-body dynamics, reported earlier for ionization of H 2 , was confirmed. A new, so far unexplained peak structure was found in an electron angular range between the regions where the so-called binary-and recoil peaks are usually observed. The need for non-perturbative calculations using a two-center basis set is demonstrated.

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“…Nevertheless, in recent years such models were developed to describe ionization by ion impact [e.g. 30,42,43].…”

Section: Resultsmentioning

confidence: 99%

Target dependence of postcollision interaction effects on fully differential ionization cross sections

et al. 2019

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“…In particular, we examine several collisional processes involving a single electron transition: photoionisation, excitation, ionisation and electron capture. A wide variety of ab initio methods have been implemented to compute scattering cross sections for atomic targets, from the early implementations of the first Born approximation (FBA) [6,7], to more sophisticated fully quantum mechanical methods, e.g., [8,9,10,11]. Whether for atoms or molecules, we shall present cross sections and compare with some experimental data.…”

Section: Outlinementioning

confidence: 99%

Collision processes using effective potentials

Mendez

Mitnik

Miraglia

2019

State of the Art of Molecular Electronic Structure Computations: Correlation Methods, Basis Sets and More

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“…Nevertheless, in recent years, such approaches have been successfully implemented e.g. [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Target dependence of post-collision effects in ionization by proton impact

Silvus

Dhital

Bastola

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

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We have measured and calculated double differential cross sections for ionization of Ne and Ar by 75 keV proton impact for a broad range of fixed projectile energy losses as a function of scattering angle. Along with data obtained previously for lighter targets this made possible a systematic analysis of post-collision effects between the scattered projectile and the continuum electron in the exit channel as a function of the target ionization potential. The data are consistent with an increasing strength of such effects with increasing ionization potential. However, second-order effects involving the projectile—residual target ion interaction also play an important role.

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Time-Dependent Close-Coupling Calculations for Ion-Impact Ionization of Atoms and Molecules

Cited by 7 publications

References 43 publications

Target dependence of postcollision interaction effects on fully differential ionization cross sections

Target dependence of postcollision interaction effects on fully differential ionization cross sections

Collision processes using effective potentials

Target dependence of post-collision effects in ionization by proton impact

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