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Atoms, Volume 13, Issue 10

2025 October - 4 articles

Cover Story: Radiation transport and diagnostics of high-energy-density (HED) density environments, such as fusion devices and stellar interiors, require a complex interface of atomic physics and plasma physics. High-accuracy atomic physics data need to be treated for plasma broadening effects in order to obtain the fundamental quantity: the opacity of matter in HED sources. This paper describes state-of-the-art R-marix calculations for complex atomic systems, as well as plasma broadening of autoionizing resonances in atomic cross sections for physical processes, which then become energy-temperature-density dependent. Results are presented for iron ions and opacity parameters for modeling. View this paper

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2 Citations

1,237 Views

12 Pages

The Opacity Project: R-Matrix Calculations for Opacities of High-Energy-Density Astrophysical and Laboratory Plasmas

Anil K. Pradhan and
Sultana N. Nahar

Atoms2025, 13(10), 85;https://doi.org/10.3390/atoms13100085

20 October 2025

Accurate determination of opacity is critical for understanding radiation transport in both astrophysical and laboratory plasmas. We employ atomic data from R-Matrix calculations to investigate radiative properties in high-energy-density (HED) plasma...

(This article belongs to the Special Issue Electronic, Photonic and Ionic Interactions with Atoms and Molecules)

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Article

1 Citations

1,067 Views

14 Pages

Single Electron Capture by Dressed Projectiles Within the Distorted Wave Formalism

Michele Arcangelo Quinto,
Juan Manuel Monti and
Roberto Daniel Rivarola

Atoms2025, 13(10), 84;https://doi.org/10.3390/atoms13100084

3 October 2025

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...

(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)

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Article

2,733 Views

28 Pages

Proton Interactions with Biological Targets: Inelastic Cross Sections, Stopping Power, and Range Calculations

Camila Strubbia Mangiarelli,
Verónica B. Tessaro,
Michaël Beuve and
Mariel E. Galassi

Atoms2025, 13(10), 83;https://doi.org/10.3390/atoms13100083

24 September 2025

Proton therapy enables precise dose delivery to tumors while sparing healthy tissues, offering significant advantages over conventional radiotherapy. Accurate prediction of biological doses requires detailed knowledge of radiation interactions with b...

(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)

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Article

1 Citations

1,172 Views

12 Pages

Integral Cross Sections and Transport Properties for Electron–Radon Scattering over a Wide Energy Range (0–1000 eV) and a Reduced Electric Field Range (0.01–1000 Td)

Gregory J. Boyle,
Dale L. Muccignat,
Joshua R. Machacek and
Robert P. McEachran

Atoms2025, 13(10), 82;https://doi.org/10.3390/atoms13100082

23 September 2025

We report calculations for electron–radon scattering using a complex relativistic optical potential method. The energy range of this study is 0–1000 eV, with results for the elastic (total, momentum-transfer and viscosity-transfer) cross...

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