Radiative lifetime and oscillator strength determinations in Xe VI

Biémont, Émile; Buchard, Virginie; Garnir, Henri-Pierre; Pj, Lefèbvre; Quinet, Pascal

doi:10.1140/epjd/e2005-00059-y

Cited by 15 publications

(25 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This experimental technique was used in a few cases in our work (i.e., for Xe VI-IX and La IV ions) [36][37][38][39]. The instrumental device of Liège University, Belgium, was employed for that purpose.…”

Section: Beam-foil Spectroscopymentioning

confidence: 99%

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Quinet

2017

Can. J. Phys.

View full text Add to dashboard Cite

During the past 20 years, part of our work has been focused on the study of the atomic structure and the determination of radiative parameters in neutral and slightly ionized heavy atoms (Z ≥ 37). These elements attracted little previous interest because of the complexity of their electronic structures, the poor knowledge of their spectra, and the difficulty to perform experimental measurements. They present, however, great interest in the development of other scientific areas, such as astrophysics and plasma physics. In this paper, we give an overview of the recent progress performed by the group of Atomic Physics and Astrophysics at Mons University (Belgium) in the theoretical modelling and the experimental analysis of such heavy elements. We also discuss some applications of the atomic data obtained in our work for the interpretation of the spectra observed from astrophysical and laboratory plasmas.Key words: atomic data, oscillator strengths, radiative transition probabilities, heavy elements.Résumé : Durant les 20 dernières années, une partie de notre travail a été focalisée sur l'étude de la structure atomique et la détermination des paramètres radiatifs dans les atomes lourds neutres et faiblement ionisés (Z ≥ 37). Ces éléments avaient attiré peu d'intérêt auparavant à cause de la complexité de leurs structures électroniques, du manque de connaissance de leurs spectres et de la difficulté à réaliser des mesures expérimentales. Ils présentent cependant un grand intérêt pour le développe-ment d'autres domaines scientifiques comme l'astrophysique et la physique des plasmas. Dans cet article, nous présentons un aperçu général des progrès récents réalisés par le groupe de Physique Atomique et Astrophysique de l'Université de Mons (Belgique) dans la modélisation et l'analyse expérimentale de tels éléments lourds. Nous discutons également quelques applications des données atomiques obtenues dans notre travail pour l'interprétation des spectres observés à partir de plasmas astrophysiques et de laboratoire.Mots-clés : ions lourds, données atomiques, temps de vie radiatifs, forces d'oscillateur, probabilités de transition.

show abstract

Section: Beam-foil Spectroscopymentioning

confidence: 99%

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Quinet

2017

Can. J. Phys.

View full text Add to dashboard Cite

show abstract

“…In our work, we modified the electric dipole matrix elements to take core polarization effects into account. Other extensive calculation and studies on noble gas ions including this effect were also carried out by Biémont and co-workers [22][23][24][25]. In this last case, all the radial wave functions were also modified by a model potential, including one-and two-body core-polarization contributions, together with a core-penetration correction.…”

Section: Atomic Calculationsmentioning

confidence: 99%

Spectral Analysis of Moderately Charged Rare-Gas Atoms

Almandos

Raineri

2017

Atoms

View full text Add to dashboard Cite

This article presents a review concerning the spectral analysis of several ions of neon, argon, krypton and xenon, with impact on laser studies and astrophysics that were mainly carried out in our collaborative groups between Argentina and Brazil during many years. The spectra were recorded from the vacuum ultraviolet to infrared regions using pulsed discharges. Semi-empirical approaches with relativistic Hartree-Fock and Dirac-Fock calculations were also included in these investigations. The spectral analysis produced new classified lines and energy levels. Lifetimes and oscillator strengths were also calculated.

show abstract

“…In addition, g f -values of an experimental and theoretical study by Biémont et al (2005) were used. These replaced g f -values of Reyna Almandos et al (2001) where available.…”

Section: Xe VI Transition Probabilitiesmentioning

confidence: 99%

“…Biémont et al (2005) encountered a problem in matching the 6d experimental level in their least-squares calculations, which Gallardo et al (2015, see this paper for further technical details) solved by adjusting configuration interaction (CI) integrals. They achieved standard deviations of 149 cm −1 in the odd parity energies (35 configurations) and 154 cm −1 (34 configurations) in the even parity.…”

Section: Xe VI Transition Probabilitiesmentioning

confidence: 99%

See 1 more Smart Citation

Stellar laboratories

Rauch¹,

Hoyer²,

Quinet

et al. 2015

A&A

Self Cite

View full text Add to dashboard Cite

Context. For the spectral analysis of spectra of hot stars with a high resolution and high signal-to-noise ratio (S/N), advanced nonlocal thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that are used for their calculation.Aims. Reliable Xe vi oscillator strengths are used to identify Xe lines in the ultraviolet spectrum of the DO-type white dwarf RE 0503−289 and to determine its photospheric Xe abundance.Methods. We publish newly calculated oscillator strengths that are based on a recently measured Xe vi laboratory line spectrum.These strengths were used to consider their radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models to analyze Xe vi lines exhibited in high-resolution and high S/N UV observations of RE 0503−289. Results. We identify three hitherto unknown Xe vi lines in the ultraviolet spectrum of RE 0503−289 and confirm the previously measured photospheric Xe abundance of this white dwarf (log Xe = −4.2 ± 0.6 by mass). Conclusions. Reliable measurements and calculations of atomic data are prerequisite for stellar-atmosphere modeling. Observed Xe vi line profiles in the ultraviolet spectrum of the white dwarf RE 0503−289 were well reproduced with the newly calculated Xe vi oscillator strengths.

show abstract

Radiative lifetime and oscillator strength determinations in Xe VI

Cited by 15 publications

References 20 publications

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Spectral Analysis of Moderately Charged Rare-Gas Atoms

Stellar laboratories

Contact Info

Product

Resources

About