The energy loss in iron is valuable knowledge due to its extended use, technological applications and open topics fundamental physics. electronic structure of solid Fe challenging, being the first groups transition metals with some d-electrons promoted conduction band while others remain bound. low description, deviation from velocity proportionality at impact energies, contribution loosely bound are active featured fields about stopping Fe. Very recent TDDFT calculations have been compared...

The energy loss in iron can serve as valuable knowledge due to its extended use technological applications and open topics fundamental physics. electronic structure of solid Fe is challenging, given that it the first groups transition metals with some d-electrons promoted conduction band while others remain bound. low description, deviation from velocity proportionality at impact energies, contribution loosely bound are active featured fields when comes stopping Fe. Very recent TDDFT...

The contribution of bound electrons to the electronic stopping power is modeled by using shellwise local plasma approximation (SLPA). An improvement this formalism proposed including Levine-Mermin dielectric function (SLPA-LM). This approach considers a more realistic description electron response facing problem damping in collective excitations. We introduce that depends on density each shell, keeping full-theoretical characteristic SLPA. implement present model obtain for metal targets...

Aims. We tested the new atomic model using atmospheric models of stars different spectral types: Sun (dG2), HD22049 (dK2, Epsilon Eridani), GJ 832 (dM2), and 581 (dM3). Methods. used Breit-Pauli distorted-wave (DW) multiconfiguration calculations, which proved to be relevant for many transitions in mid-infrared (MIR) range. The Mg I includes following: i) recomputed ECS data through DW method, including superlevels. ii) For nonlocal thermodynamic equilibrium (NLTE) population 5676...

Abstract This work presents exchange potentials for specific orbitals calculated by inverting Hartree–Fock wavefunctions. was achieved using a Depurated Inversion Method. The basic idea of the method relies on substitution and eigenvalues into Kohn–Sham equation. Through inversion, corresponding effective were obtained. Further treatment inverted potential should be carried on. depuration is careful optimization which eliminates poles also ensures fullfilment appropriate boundary conditions....

The stopping power of protons through Hf foil has been studied both experimentally and theoretically. measurements were performed at the Laboratory Accelerators X-Ray Diffraction in Lisbon by using transmission method on self-supporting material. overall uncertainty around $5%$ was established over energy range (0.6--2.5) MeV. theoretical developments involved fully relativistic atomic structure calculations for Hf, which required solution Dirac equation. shell-wise local plasma...

The International Atomic Energy Agency (IAEA) stopping power database is a highly valued public resource compiling most of the experimental measurements published over nearly century. database—accessible to global scientific community—is continuously updated and has been extensively employed in theoretical research for more than 30 years. This work aims employ machine learning algorithms on 2021 IAEA predict accurate electronic cross sections any ion target combination wide range incident...

In the last decade, lanthanides have become subject of multiple studies due to their importance in technological applications. This paper aims systematically study energy loss per unit length protons on 15 lanthanides, from lanthanum lutetium. We investigate stopping power cross sections by considering influence relativistic atomic structure, namely description $4f$ electrons, number electrons valence shells, and electronic screening same or close subshells. The model considers separate...

Abstract In the present work, we investigate ionization of molecules biological interest by impact multicharged ions in intermediate to high energy range. We performed full non-perturbative distorted-wave calculations (CDW) for thirty-six collisional systems composed six atomic targets: H, C, N, O, F, and S—which are constituents most DNA molecules—and charged projectiles (antiprotons, He, B, O). On account radiation damage caused secondary electrons, inspect angular distributions emitted...

We investigate scaling rules for the ionization cross sections of multicharged ions on molecules biological interest. The are obtained using a methodology presented in [Mendez et al. J. Phys B (2020)], which considers distorted-wave calculations atomic targets combined with molecular stoichiometric model. examine nuclear charges Z from +1 to +8 impacting five nucleobases -adenine, cytosine, guanine, thymine, uracil-, tetrahydrofuran, pyrimidine, and water. section ion charge number active...

Semi-empirical models of the solar atmosphere are used to study radiative environment any planet in our system. There is a need for reliable atomic data neutral atoms and ions obtain improved calculated spectra. Atomic parameters crucial computing correct population elements through whole stellar atmosphere. Although there very good agreement between observed spectra Sun, still mismatch several spectral ranges due lack its inaccuracies, particularly neutrals like Mg I. To correctly represent...

This work investigates the electronic stopping power for protons of a tungsten plasma at various electron densities and temperatures. The study employs dielectric formalism to model due free bound electrons, considering relativistic non-relativistic effects. is modeled using shellwise local approximation (SLPA) introduced by Montanari Miraglia. ionization state also examined, revealing its impact on contribution. We compare our results with T-Matrix approach Li-Petrasso electrons in...

In this contribution, we review the state of art experimental electronic stopping power data available in IAEA database. We examine thoroughly abundance or lack data, quality recent measurements, and trends. analyze evolution time characteristics, achievements, failures. also discuss comparisons with SRIM-2013 calculations for many interesting cases. Sparsely measured systems energy regions are observed, stressing need new reliable independent theoretical predictions.

We present a new non-perturbative model to describe the stopping power by ionization of $d$-electrons transition metals. These metals are characterized filling d-subshell and promotion part electrons conduction band. The contribution d-electrons at low-impact energies has been noted experimentally in past as break linear dependence with ion velocity. In this contribution, we response these considering atomic "inhomogeneous" momentum distribution. focus on Groups 10 11 periodic table: Ni, Pd,...

Abstract The L -subshell ionization mechanism is studied in an ultra-thin Os target bombarded by 4–6 MeV/u fluorine ions. Multiple effects are considered through the change of fluorescence and Coster-Kronig yields while determining cross sections from x-ray production sections. present experimental values compared with various theoretical approximations: (i) relativistic semi-classical approximation (RSCA), (ii) shellwise local plasma (SLPA), (iii) ECUSAR theory. We also take into account...

The International Atomic Energy Agency (IAEA) stopping power database is a highly valued public resource compiling most of the experimental measurements published over nearly century. database-accessible to global scientific community-is continuously updated and has been extensively employed in theoretical research for more than 30 years. This work aims employ machine learning algorithms on 2021 IAEA predict accurate electronic cross sections any ion target combination wide range incident...