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Keywords = dressed projectile

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15 pages, 1029 KB  
Article
Single Ionization with Dressed Projectiles: An Improved Theory for Both Long- and Short-Range Interactions
by Nicolás J. Esponda, Michele A. Quinto, Roberto D. Rivarola and Juan M. Monti
Atoms 2025, 13(11), 88; https://doi.org/10.3390/atoms13110088 - 9 Nov 2025
Viewed by 275
Abstract
In this work, we present a theoretical model to investigate electron emission in collisions between dressed ions with He atoms and H2 molecules. The projectile potential is described as the sum of a long- and short-range terms. The last term includes a [...] Read more.
In this work, we present a theoretical model to investigate electron emission in collisions between dressed ions with He atoms and H2 molecules. The projectile potential is described as the sum of a long- and short-range terms. The last term includes a screening function that has its maximum at short distances. The present model is based on the Continuum Distorted Wave Eikonal Initial State (CDW-EIS) theory, but the Eikonal approximation is only made within the long-range transition amplitude. This now leads to physically correct predictions, whenever dressed projectiles are involved, in the binary-encounter peak. Indeed, double-differential cross-sections spectra is calculated and compared with existing experimental data, finding that this model is capable of reproducing some well-known phenomena depending on the projectile charge state. Namely, the dependence of the binary-encounter peak magnitude with the projectile charge state. Full article
(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)
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14 pages, 865 KB  
Article
Single Electron Capture by Dressed Projectiles Within the Distorted Wave Formalism
by Michele Arcangelo Quinto, Juan Manuel Monti and Roberto Daniel Rivarola
Atoms 2025, 13(10), 84; https://doi.org/10.3390/atoms13100084 - 3 Oct 2025
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Abstract
Single electron capture in collisions involving neutral hydrogen atoms impacted by highly charged dressed projectiles is theoretically investigated using the distorted wave formalism. A series of continuum distorted wave approximations is employed to investigate the electron capture from neutral hydrogen atom impact by [...] Read more.
Single electron capture in collisions involving neutral hydrogen atoms impacted by highly charged dressed projectiles is theoretically investigated using the distorted wave formalism. A series of continuum distorted wave approximations is employed to investigate the electron capture from neutral hydrogen atom impact by boron and carbon projectiles. The projectile potential is described using a two-parameter analytical Green–Sellin–Zachor (GSZ) model potential. The theoretical prediction of total cross sections are compared against other theories and experiments. We looked at a very broad range of collision energies, from 10 keV/u up to 10 MeV/u. In addition, the state-selective cross sections for boron ions are presented. Full article
(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)
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