Cross sections for electron emission in the energy range from $2--300\mathrm{eV}$ were measured $60\mathrm{MeV}/u$ ${\mathrm{Kr}}^{34+}$ ions impacting on ${\mathrm{H}}_{2}$. Model calculations are introduced to guide search interference effects spectra produced by coherent of electrons two H atoms analogy with Young's two-slit experiment. Experimentally, a full sinusoidal-like oscillation was observed up $250\mathrm{eV}$ good agreement calculations. The oscillatory structure is found be...

Among the numerous constituents of eukaryotic cells, DNA macromolecule is considered as most important critical target for radiation-induced damages. However, up to now ion-induced collisions on components remain scarcely approached and theoretical support still lacking describing main ionizing processes. In this context, we here report a description proton-induced ionization RNA bases well sugar–phosphate backbone. Two different quantum-mechanical models are proposed: first one based...

Purpose: To outline the limitations of PENELOPE (acronym PENetration and Energy LOss Positrons Electrons) as a track-structure code, to comment on modifications that enable its fruitful use in certain microdosimetry nanodosimetry applications.Methods: Attention is paid way which inelastic collisions electrons are modelled ensuing implications for analysis.Results: Inelastic mean free paths collision stopping powers calculated with two well-known optical-data models compared. An ad hoc...

The existence of Young-type interference patterns, recently measured [N. Stolterfoht et al., Phys. Rev. Lett. 87, 023201 (2001)] in double-differential cross sections for single-electron ionization ${\mathrm{H}}_{2}$ molecules by ion impact, is theoretically supported calculations obtained using a molecular distorted-wave model introduced here. importance adequately describing the target as molecule emphasized. contributions from direct and terms are separated.

Single ionization cross sections for heavy-ion impact on ${\mathrm{H}}_{2}$ are calculated by applying the continuum-distorted-wave--eikonal-initial-state model. We have used a representation of bound-state initial wave function which takes into account molecular character target. To describe final continuum state we two-effective-center approximation, previously employed with success to study electron capture from ion impact. Interference effects also analyzed and dependence oscillation...

Induction of DNA double strand breaks after irradiation is considered prime importance for producing radio-induced cellular death or injury. However, up to now ion-induced collisions on bases remain essentially experimentally approached and a theoretical model cross section calculation still lacking. Under these conditions, we here propose quantum mechanical description the ionization process induced by light bare ions bases. Theoretical predictions in terms differential total sections...

Fast highly charged C and O ion-induced total ionization of an RNA base molecule, uracil (C${}_{4}$H${}_{4}$N${}_{2}$O${}_{2}$, $m=112$ amu), has been investigated in a wide energy range keV to MeV. A combined study the collision products using time-of-flight mass spectrometer electron allows one determine absolute cross sections (TCSs). Experimental measurements TCSs are compared theoretical predictions performed classical trajectory Monte Carlo over-barrier (CTMC-COB) quantum mechanical...

Knowledge of the detailed evolution whole charge-state distribution projectile ions colliding with targets is required in several fields research such as material science and atomic nuclear physics but also accelerator physics, particular regard to foreseen large-scale facilities. However, there a lack data for collisions nonperturbative energy domain that involve many-electron projectiles. Starting from etacha model we developed [Rozet et al., Nucl. Instrum. Methods Phys. Res., Sect. B 107,...

In this work, we report total cross sections for the single electron capture process induced on DNA/RNA bases by high-energy protons. The calculations are performed within both continuum distorted wave and wave-eikonal initial state approximations. biological targets described framework of self-consistent methods based complete neglect differential overlap model whose accuracy has first been checked simpler bio-molecules such as water vapour. Furthermore, multi-electronic problem...

We report the energy and angular distribution of electron emission from an RNA base molecule uracil in collisions with 3.5-MeV/u bare C ions. The absolute double differential cross sections (DDCS) are measured for between a few to 600 eV. distributions compared those obtained O${}_{2}$ same experiment. single (SDCS) also deduced. DDCS SDCS state-of-the-art quantum-mechanical models based on continuum distorted wave-eikonal initial state (CDW-EIS) correct boundary first Born (CB1)...

Using a multi-scale theoretical approach from first principles, we show that the production of HO2 radicals in liquid water can be understood initial Coulomb explosion doubly ionized molecules. Based on separation time scales, used three different models, each one associated with specific scale. The ∼1 fs radiolysis is taken care Monte Carlo code whose basic ingredients are cross-sections. These have been calculated present work using continuum distorted wave eikonal state (CDW-EIS) model...

Ionization and fragmentation of uracil molecules (C 4 H N 2 O , m = 112 amu) in collisions with fast highly charged C, F ions have been investigated using a time-of-flight mass spectrometer.The measurement total ionization cross sections (TCS) is reported for different charge states (q), such as q+ q 5-8; 5,7; C 5 6.These studies reveal (q/v) ∼1.5 dependence TCS, contrast, to the well-known -dependence ion-atom collisions.Scaling properties TCS projectile energy are obtained.The experimental...

Water is a common surrogate of DNA for modelling the charged particle-induced ionizing processes in living tissue exposed to radiations. The present study aims at scrutinizing validity this approximation and then revealing new insights into proton-induced energy transfers by comparative analysis between water realistic biological medium. In context, self-consistent quantum mechanical ionization electron capture reported within continuum distorted wave-eikonal initial state framework both...

Single ionization total cross sections for proton impact on ${\mathrm{N}}_{2},$ CO, ${\mathrm{CH}}_{4},$ and ${\mathrm{CO}}_{2}$ are calculated by applying the continuum-distorted-wave-eikonal-initial-state model. Two different approximations have been considered molecular targets: Bragg's additivity rule a representation of bound state target wave function. In latter, section is approximated linear combination atomic where coefficients determined from population analysis binding energies...

Purpose: The LIonTrack (Light Ion Track) Monte Carlo (MC) code for the simulation of H + , He 2+ and other light ions in liquid water is presented together with results a novel investigation energy‐deposition site properties from single ion tracks. Methods: continuum distorted‐wave formalism eikonal initial state approximation (CDW‐EIS) employed to generate energy angle electrons emitted ionizing collisions 2 O molecules. model Dingfelder et al. [“Electron inelastic‐scattering cross sections...

The process of multiple electron ionization Ne and Ar noble gases produced by impact proton beams is studied in the framework independent-electron model. role played different mechanisms analyzed, including intershell Auger intrashell Coster-Kronig emission, which follow production vacancies due to direct interaction projectile with target electrons. present results, obtained continuum distorted wave--eikonal initial state (CDW-EIS) approximation, confirm previous predictions given a...

We present a detailed study of the potential energy surfaces water dication correlating asymptotically with O((3)P) and O((1)D). Using ab initio multireference configuration interaction method, we computed large ensemble data, which was used to generate fit each surface for bending angles theta > or = 80 degrees OH distances R(OH) 1.0 a.u. The is investigate dissociation dynamics along several initial geometries corresponding Franck-Condon transition from neutral singly ionized molecule. For...

The single ionization of H2 by fast ions is theoretically studied using a version the continuum distorted wave eikonal initial state model which takes into account two-centre geometry molecule. Five-fold differential cross sections as function electron momenta in final and orientation molecule are calculated for impact 13.7 MeV/u-C6+ ions. angular distribution emitted electrons shows distinctive structures arise from coherent emission two nuclei produces well defined interference patterns...

We employ the independent-event model to study transfer-ionization (TI) process in H+, He2+ + He collisions. consider both ionization-capture and capture-ionization paths. The single-particle probabilities for all channels are calculated with continuum distorted wave eikonal initial state model. With TI we calculate doubly differential total cross sections which compared available experimental data. Our present results better agreement experiments than calculations using independent-electron...