Atomic structure; Oscillator strengths; Ta VII spectrum; Transition probabilities; Charge state; Ionic impurity; Multi-platform; Radiative transition rate; Relativistics; Spectra's; Radiation; Atomic and Molecular Physics, and Optics; Spectroscopy
Abstract :
[en] Tantalum (Z=73) is an element that is produced in the neutron-induced transmutation of tungsten (Z=74) which in turn will compose the divertors in Tokamaks. As a consequence, their sputtering may generate ionic impurities of all possible charge states in the deuterium-tritium plasma that could contribute to radiation losses in controlled nuclear devices. The radiative properties of these ions have therefore potential important applications in this field. In this context, a multiplatform approach has been adopted in order to compute the Ta VII radiative rates and estimate their accuracy. The oscillator strengths and transition probabilities have been calculated for the 237 electric dipole (E1) transitions of the Ta VII spectrum as classified by Ryabtev et al. (2014). Three independent atomic structure models have been used; one based on the semi-empirical pseudo-relativistic Hartree–Fock (HFR) method and two based on the fully relativistic ab initio multiconfiguration Dirac–Hartree–Fock (MCDHF) method.
Disciplines :
Physics
Author, co-author :
Bokamba Motoumba, E.; Faculté des Sciences et Techniques, université Marien Ngouabi, Brazzaville, Congo
Enzonga Yoca, S.; Faculté des Sciences et Techniques, université Marien Ngouabi, Brazzaville, Congo ; Conseil Africain et Malgache pour l'Enseignement Supérieur – CAMES, Ouagadougou 01, Burkina Faso
Quinet, Pascal ; Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids ; Physique Atomique et Astrophysique, université de Mons – UMONS, Mons, Belgium
Palmeri, P.; Physique Atomique et Astrophysique, université de Mons – UMONS, Mons, Belgium
Language :
English
Title :
Determination of the radiative transition rates in Ta VII using a multiplatform approach
Publication date :
April 2024
Journal title :
Journal of Quantitative Spectroscopy and Radiative Transfer
PP and PQ are respectively Research Director and Research Associate of the Belgian Fund for Scientific Research F.R.S.-FNRS . Financial support from this organization is gratefully acknowledged. EBM is grateful to Belgian colleagues for their hospitality during his stay at Université de Mons – UMONS. EBM and SEY was supported by Université Marien Ngouabi from Congo .PP and PQ are respectively Research Director and Research Associate of the Belgian Fund for Scientific Research F.R.S.-FNRS. Financial support from this organization is gratefully acknowledged. EBM is grateful to Belgian colleagues for their hospitality during his stay at Université de Mons – UMONS. EBM and SEY was supported by Université Marien Ngouabi from Congo.
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