We have measured the double-differential cross sections (DDCS) for electron emission in ionization of H${}_{2}$O molecules under impact $4.5$-MeV/u O${}^{8+}$ ions. The data were collected between 1 and 600 eV, an angular range ${20}^{\ensuremath{\circ}}$--${150}^{\ensuremath{\circ}}$ by using electrostatic hemispherical analyzer. In experiment we used vapor a static gas condition which allowed us to deduce absolute value sections. single-differential (SDCS) total also been obtained. DDCS as...

Single ionization from water molecules by impact of protons, alpha particles and C6 + ions is studied. The post- prior-versions the continuum distorted wave-eikonal initial state (CDW-EIS) model within an independent electron approximation are employed to compute double differential cross sections. To avoid complexity using numerical molecular states in cross-section calculations, effective Coulombic wavefunctions employed. However, this may lead appearance post–prior discrepancies fact...

The doubly differential distributions of low-energy electron emission in the ionization water molecules under impact fast bare oxygen ions with energy 48 MeV are measured. measured data compared two quantum-mechanical models, i.e. post and prior versions continuum distorted wave–eikonal initial state (CDW-EIS) approximation, first-order Born approximation final wavefunctions verifying correct boundary conditions (CB1). An overall excellent qualitative agreement is found between CDW-EIS...

Single ionization of diatomic molecules due to the impact fast proton beams is theoretically studied. The main interest focussed on analysis possible existence interference patterns in corresponding electron spectra coherent emission from vicinities molecular centres. case N2 targets considered. A fully coplanar geometry which emitted electron, incident particle and molecule are all same plane dynamics reaction described within continuum distorted wave-eikonal initial state model, exit...

We have measured the absolute double-differential cross sections (DDCSs) for electron emission in ionization of O${}_{2}$ molecules under impact 3.5-MeV/u C${}^{6+}$ ions. The data were collected between 10 and 600 eV, an angular range ${30}^{\ensuremath{\circ}}$ to ${150}^{\ensuremath{\circ}}$. single-differential (SDCSs) angle energy are deduced from DDCS spectra. Also, total section has been obtained SDCS spectra as well compared with continuum distorted-wave eikonal initial-state...

We have measured the absolute double-differential cross sections (DDCS) for electron emission in ionization of He and Ne atoms under impact 6-MeV/u ${\mathrm{C}}^{6+}$ ions. Data were collected between 1 500 eV He, while this range was extended up to 1000 eV. The angular ranges covered experiment are ${30}^{\ensuremath{\circ}}$ ${150}^{\ensuremath{\circ}}$ ${20}^{\ensuremath{\circ}}$ ${160}^{\ensuremath{\circ}}$ Ne, respectively. DDCS spectra compared with prior post forms state-of-the-art...

The presence of interference patterns in doubly differential cross sections is investigated for single electron ionization a heteronuclear system, the HeH+ molecular ion, produced by highly energetic protons. These interferences, which are due to coherent emission from vicinity target nuclei, preserved even after averaging over all orientations. However, when compared with homonuclear H2 case, effect appears be less pronounced partial localization electrons around alpha particle centre....

Electron emission from diatomic heteronuclear targets by bare ion impact is analysed. Interference patterns are shown to appear in electron angular distributions, which explained terms of coherent the neighbourhood atomic centres composing target. The relationship between ionization and circularly polarized photon investigated.

Measurement of the energy and angular distributions double differential cross section (DDCS) electron emission from Ne Xe atoms in collision with 5 MeV u−1 bare carbon ions is reported. This study aimed to investigate processes case multi-electronic systems. In general, several clear differences between spectra are found, which indicate influence increasing number electrons. For instance, sharp peak due binary nature almost absent Xe, unlike Ne, could be understood contribution strongly...

We present theoretical calculations of single ionization H2 molecules by 75 keV proton impact. The computed fully differential cross sections for different electron ejection geometries and projectile kinematical conditions are compared with recent measurements made Hasan et al (2014 J. Phys. B: At. Mol. Opt. 47 215201). employ a molecular version the continuum distorted wave-eikonal initial state model, where all interactions in exit channel considered on an equal footing. In addition, our...

Multiple electron emission in collisions between bare multiply charged ions and diatomic molecules is studied. The role played by Auger-type cross sections for fixed number of ejected electrons investigated. It shown that this postcollisional reaction gives the main contribution to these at high enough impact velocities. This behavior accentuated as ionization degree increases.

Multiple electron ionization of diatomic molecular targets is studied for impact proton beams. It shown that these targets, as it was previously predicted atomic ones, postcollision Auger type emission following inner-shell vacancy production dominates the reaction at high enough energies. Moreover, proven this dominance increases degree increases.

We have measured the double differential cross sections (DDCSs) for low energy electron emission from O2 under impact of 51 MeV bare carbon ions. This study is aimed at investigating Young-type interference in a multi-electronic diatomic molecule. The DDCS spectra, and angle, are compared with state-of-the-art continuum distorted wave-eikonal initial state (CDW-EIS) calculations. ratios (i.e. O2/2O) do not produce any oscillatory behaviour due to effect unlike that observed case H2....

Single ionization from ammonia and methane molecules by impact of protons is analysed. Double differential cross sections are calculated, within the post- prior-versions continuum distorted wave-eikonal initial state (CDW-EIS) model, considering two different representations bound active electron. A comparison between both set results shows a very little sensitivity double to representation in case molecules. On other hand, discrepancies found when CH4 molecular target considered, showing...

In this work, we revisit the dynamics of carbon monoxide molecular chemisorption on Cu(110) by using quasi-classical trajectory calculations. The molecule-surface interaction is described through an atomistic neural network approach based Density Functional Theory calculations a nonlocal exchange-correlation (XC) functional that includes effect long-range dispersion forces: vdW-DF2 [Lee et al. Phys. Rev. B, 82, 081101 (2010)]. With approach, significantly improve agreement with experiments...

Absolute double differential cross sections (DDCS) of electron emission were measured for ionization ${\mathrm{N}}_{2}$ by fast electrons with energy 7 keV. Measurements performed different angles and energies. Evidence oscillation due to Young-type interference was observed in the DDCS ratios all angles. The frequency large backward angle is found be larger compared that small forward angle. Consequently, forward-backward asymmetry parameter reveals oscillatory structure even more clearly....

The presence of interference patterns in the spectra emitted electrons from HeH+ molecular ions due to impact bare is analysed. It shown that these oscillations, which are explained terms coherent emission vicinities target nuclei, preserved even after averaging over all orientations. influence partial localization around alpha particle center studied. relationship between electron ionization by ion and photoionization investigated.

In the present work we calculate multiple ionization cross sections, as a function of orientation molecular axis with respect to ion beam, for impact highly charged ions on N2 and O2molecules. We use different approaches obtain single probabilities that are necessary compute these quantities into Independent Electron Model. The in.uence differential sections is analized. An adequate description existing data obtained.

Single ionization from water molecules by impact of bare ions is studied.Different approximations are employed, within the post and prior versions continuum distorted wave-eikonal initial state model, to calculate double differential cross sections.Post-prior discrepancies observed between theoretical results.The sensitivity calculations description bound orbitals investigated.

The role of the initial bound and final continuum wavefunctions in single ionization ammonia methane molecular targets by swift proton beams is studied within Continuum Distorted Wave-Eikonal Initial State model.

We report a combined experimental and theoretical study of double differential electron emission in ionization different multi-electronic atoms under fast highly charged bare ion impact. The main aim is to un-derstand the dynamics for these targets which quite from one or two systems.