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Atoms
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Atom and Plasma Spectroscopy
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Atom and Plasma Spectroscopy

A special issue of Atoms (ISSN 2218-2004). This special issue belongs to the section "Atomic, Molecular and Nuclear Spectroscopy and Collisions".

Deadline for manuscript submissions: 15 May 2025 | Viewed by 2338

Special Issue Editor

Dr. Karol Kozioł

E-Mail Website
Guest Editor
National Centre for Nuclear Research, 05-400 Otwock, Poland
Interests: atomic; molecular and optical physics; theoretical physics and theoretical chemistry; X-ray fluorescence; synchrotron radiation; X-ray optics

Special Issue Information

Dear Colleagues,

Plasma spectroscopy is one of the oldest and most established diagnostic tools in astrophysics and plasma physics. In fact, the oldest spectroscopic methodology, flame spectroscopy, dated back to the seventeenth century and consisted of a spectroscopy of ions in plasma. Nowadays, by analysing the light emitted or absorbed by atoms and ions in plasma, spectroscopy reveals critical information about the plasma's properties, such as temperature, density, and composition. In plasma, numerous atomic excited states can exist simultaneously, making spectroscopic analysis complex. This calls for suitable theoretical solutions. In recent years, great progress has been made in precise ab initio structure calculations due to fast-growing computational powers and the development of new computational codes.

This Special Issue aims to create a space for sharing recent research developments interesting for the plasma research community, both related to astrophysics and artificial plasma (tokamak or laser-made). The scope includes high-quality calculations and measurements of spectral parameters, such as line energy/wavelength, transition probabilities, oscillator strengths, linewidths, and excited-state lifetimes. Papers on the collisional–radiative modelling of ions in plasma are also welcome.

I look forward to receiving your contributions.

Dr. Karol Kozioł
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atoms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • spectroscopy
  • atomic structure
  • ab initio calculations
  • atomic transition probabilities, oscillator strengths, line widths, state lifetimes
  • line identification
  • plasma diagnostics
  • atomic physics in plasmas
  • collisional–radiative modelling

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

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14 pages, 749 KiB  
Article
Modelling of X-Ray Spectra Originating from the He- and Li-like Ni Ions for Plasma Electron Temperature Diagnostics Purposes
by Karol Kozioł, Andrzej Brosławski and Jacek Rzadkiewicz
Atoms 2025, 13(2), 18; https://doi.org/10.3390/atoms13020018 - 9 Feb 2025
Viewed by 475
Abstract
The multi-configurational Dirac–Hartree–Fock method has been used to examine the electron correlation effect on wavelengths and transition rates for L→K transitions occurring in He- and Li-like nickel ions. The collisional-radiative modelling approach has been used to simulate the X-ray spectra, in [...] Read more.
The multi-configurational Dirac–Hartree–Fock method has been used to examine the electron correlation effect on wavelengths and transition rates for L→K transitions occurring in He- and Li-like nickel ions. The collisional-radiative modelling approach has been used to simulate the X-ray spectra, in a 1.585–1.620 Å wavelength range, originating from the He-like nickel ions and their dielectronic Li-, Be-, and B-like satellites for various electron temperature values in the 2 keV to 8 keV range. The presented results may be useful in improving the plasma electron temperature diagnostics based on nickel spectra. Full article
(This article belongs to the Special Issue Atom and Plasma Spectroscopy)
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18 pages, 1928 KiB  
Article
Calculated Transition Probabilities for Os VI Spectral Lines of Interest to Nuclear Fusion Research
by Maxime Brasseur, Patrick Palmeri and Pascal Quinet
Atoms 2025, 13(2), 11; https://doi.org/10.3390/atoms13020011 - 21 Jan 2025
Viewed by 672
Abstract
In this work, we present a new set of transition probabilities for experimentally classified spectral lines in the Os VI spectrum. To do this, two independent computational approaches based on the pseudo-relativistic Hartree–Fock, including core polarization effects (HFR+CPOL) and fully relativistic Multiconfiguration Dirac–Hartree–Fock [...] Read more.
In this work, we present a new set of transition probabilities for experimentally classified spectral lines in the Os VI spectrum. To do this, two independent computational approaches based on the pseudo-relativistic Hartree–Fock, including core polarization effects (HFR+CPOL) and fully relativistic Multiconfiguration Dirac–Hartree–Fock (MCDHF) methods, were used, with the detailed comparison of the results obtained with these two approaches allowing us to estimate the quality of the calculated radiative parameters. These atomic data, corresponding to 367 lines of five-times ionized osmium between 438.720 and 1486.275 Å, are expected to be useful for the analysis of the spectra emitted by fusion plasmas in which osmium could appear as a result of transmutation by the neutron bombardment of tungsten used as component of the reactor wall, such as the ITER divertor. Full article
(This article belongs to the Special Issue Atom and Plasma Spectroscopy)
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Other

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12 pages, 354 KiB  
Opinion
Limits to the Precision of Atomic Lifetime Measurements
by Elmar Träbert
Atoms 2024, 12(12), 73; https://doi.org/10.3390/atoms12120073 - 20 Dec 2024
Viewed by 681
Abstract
The mean lives of certain levels in atoms or not so highly charged ions have been measured with a precision on the order of 0.1%. This is better than most other atomic lifetime measurements, but is still much less precise than many measurements [...] Read more.
The mean lives of certain levels in atoms or not so highly charged ions have been measured with a precision on the order of 0.1%. This is better than most other atomic lifetime measurements, but is still much less precise than many measurements of other entities. Why is it that atomic level lifetime and transition rate measurements are not much more precise? Full article
(This article belongs to the Special Issue Atom and Plasma Spectroscopy)
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